1. Keep the same feel as fallout. This is a must
2. Progressive world. i.e. A "barter town" that grows with the community. More people join the city as a Permanent resident the city eventually grows to keep up with the population. Starts small but grows over time. So people have the feeling they effect the game as compared to just playing it.
3. Clan, Guild, Tribe land ownership or squatting rights. i.e. We claim bunker X every so often fight for rights to keep claiming it. Having it under your control gains certain perks depending which piece of land you held. This one comes with a med station, this one comes with an Armory. They don't all have to but some nice choice spots should. Think mad max one tribe has the tanker with the gas the tribe storming the gates wants it.
4. Factions outside of tribe, guild, clan. Ghouls, vampires *I know these are more of a recent fallout 3 idea but its a good one especially the twilight/buffy craze going on* mutants on one side. Humans, Cyborgs and Brotherhood on the other. *probably could think up more but want to keep moving* But make it so these factions are not all limiting. If you want to make a Ghouls but be down for the humans you must do a quest to earn reputation with them as you progress and your rep becomes better more and more things in there faction are unlocked as they begin to trust you more and more.
5. Full Customization. Get away from the Standard if you want to be the best you must look like this. I mean yes some armor has certain bonuses with the gear i.e. power armor, and rare pieces of gear. Get away from this People want to make there character look like what every they want not fall into line and blend in with everyone else. If i want my guy in a duster with liberty spikes and Golf bag over my shoulder i should be able to do so without gimping my abilities. You want power armor well tough your going to look like everyone else but your going to have a slight bonus but not enough that your cant play the game without that bonus.
6. By doing the above you can create a fun wide open world that people feel they are actually a part of and have control over not just a world they play around in that what they do has no effect on the world. A more emersive experience and enjoyable time playing. That will keep people playing the fun of seeing whats going to happen next. People love Surprises keep us surprised and we will keep coming back.
7. Minimal Grinding- One of the banes of MMO's that feel of having to grind for your next level. You could even get rid of levels if you wanted. If you want perk X you must do this quest to earn it or learn it. That would get rid of the Grind of most MMO's. Make it loaded with quests that are fun and exciting. Rewards that offer exp and the experience of a fun quest. Joe Smith was robbed by Guy X over here ...go kill him and get my stuff back. I want you to locate my Friend/wife/husband. Just random stuff that you would find in that type of world.
8. Make it large. Do not make it this tight packed area we are bottled into. Make it large and expansive don't hold us to one city or zone. Make it the U.S. not all of it but a big chunk. This part and this part could have so high radiation that even with rad suits and doped up on rad-x you still cant cross it. Expansions could be these areas are finally livable.
Long story short you make a world that worth playing in and each and every time you have fun playing so it doesn't feel like a Job leveling your character and we will keep coming back and paying you to have fun in the world you have created.
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I have put further Thought into Races
Humans- Your standard humans nothing real special other other then being a well balanced all around.
Cyborg/Android- Bonuses to techy side (ie Energy weapons, Science, Maybe lock-pick with built in tools)Bonuses to Endurance and Str. Negatives to stealth and thievery.
Ghouls- Standard Fallout Ghouls with tactics like effects (slightly modified for MMORPG) Regen health to eating flesh
Mutants *standard fallout mutants*- Same as fallout tactics (Slightly Modified for MMORPG) Strong and tough but dumb as a post.
Here is were we get outside of Normal Fallout cannon
Vampires-Same as Humans except stat bonus for night and negatives for day. Maybe a charisma bonus and slightly tougher. Ability to drain blood for health and "buffs" depending on which creature blood was taken from.
Mutants- Different then the normal mutants fallout is known for. Watch the 50's sci fi movies. Mutation from radiation have always been a big part of that era. But for example just like you pick some areas to specialize in Energy weapons, Lock picking, etc.... you could pick from a list of mutations extra arm *pick it twice for 4 arms*, Extra eyes for perception bonus, Gills for prolonged water submersion, Scaly Skin for extra armor bonus, Quick health regeneration, the list could be expansive adding flavor to the race. So come with negative effects, noticeable mutations would have most "normal" humans wary or even go as far as banned from certain "puritan" zone/cities.
More could be created but that is a good list so far.
Each one could have access to a certain class list Humans probably having the most as "the balanced" race
Wanderer/ Explorer= your standard all around jack of all trades
Smuggler= ability to rent shop space certain crafting abilities but gain access to smuggler shops discounts and selling bonuses.
Slaver= ability to sell people for cash and access to underground black market of confiscated goods
Technician=Your "Blacksmith" type, ability to craft goods at a higher level then Smuggler and sell items via a shop.
Medic= Better health regenerative abilities and making medications to be sold
Brotherhood= access to power armor quicker then anyone but held to code of ethics violate the ethics to much and become an outcast, while either brotherhood or outcast gain access to special shops for each type, want to regain status with brotherhood could be penance quests to regain favor.
Thief=Out for self, bonuses to lock picking and hacking. Access to Underground Black market style shops.
Assassin= Contact killers special quests for Targets, Specialize in "sniping style" and Melee combat, but if caught doing assassinations in city or by witnessed, Become outlawed and hunted by local "law"
Law Officer *cheesy name i know*= Opposite of assassins and thieves. When thieves or assassins get caught officer are the ones who can check local "NPC" to hunt them down stun or kill them loot corpse for some item *not equipment loss but proof they have done there job* turn that item in for the reward.
These are just a few of the ideas.
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Well I was just using the term "class" so people who are familiar with MMORPG's would have an easier time understanding them. Personally I like the quest to become a member of this faction/job. Leave and Join as you wish. I prefer some decent quest chains nothing that takes weeks to compete. But switching jobs should be able to be done in a single afternoon of gaming. Once you have done the quest you can switch to those can be done without having to request....Almost like unlocking them. But to switch to a competing faction should require a quest each and every time.
i.e. You cant go become a Lawman as a slaver, Assassin, Thief.....without some quest involving proving your loyalty.
I would also like to see something along the lines of Faction Loyalty bonus. Along the lines of your a 5th level Assassin you have unlock something special for that class, Better armor, Stronger Blade stuff like that. So there is a benefit to sticking with a "class/faction" for an extended period of time. Play for long enough Gain Max level for every faction and be able to bounce back and forth between "factions/Classes" as you desire as a reward for being so diligent as a player.
Doing something like that also opens up Special Class unlocks. Kinda like standard pen and paper RPG. Must be *Numbers are just for explanation purposes*5th level Brotherhood and 5th Level Lawman to unlock The Enforcer Faction *name is just random for explanation*
Think of it like a reverse Skill tree. For a lack of a better explanation if anyone has played Final Fantasy Tactics. The Job system, they could be changed on the fly but you had to achieve certain lvls of various jobs to learn the basic skills to become an Advanced Job.
Not only would this make the game a ...prolonged adventure *which is were MMORPG's get their real money from Monthly fees* and keep coming back...But new Factions/job could be constantly added with small content patches to keep the game new and exciting.
Since its more then likely wouldn't be "raiding/instances" based game the content could be new quests, areas, "classes/faction" Plot twists updated environments. Just something that keep the game world rolling like its a real world and not just some stale static world like most...well all MMORPG's