I know the game isn`t out yet and it`s hard to judge but here are one of the few things we can compare:
a ) Music. We haven`t heard all of the music but we`ve gotten a pretty good idea of how the music is going to be from watching the trailers. It doesn`t amaze me very much as some past games had better music. If I were to compose a list then it would be like this:
1. Daggerfall. I haven`t played this much but from the little I`ve played the music was very fitting.
2. Morrowind. Relaxing music that excellently blends in.
3. Skyrim. The music blends in with the game but isn`t really that amazing.
4. Oblivion. I wasn`t amazed by Oblivion`s music. Could have been much better. I don`t think they even had a track for the Oblivion cells to acquaint the hellish landscape and enemies.
B) Dialogue. This will probably depend on the player`s preferance. Personally I like Morrowind`s dialogue system the most and I don`t think I`ll prefer the Skyrim`s dialogue system over but I`m sure many will like the way they did it in Skyrim. Oblivion`s dialogue was a little strange as it zoomed close into the NPC`s face and you could often see light flickering off their face, giving an alien feeling. Not much to say about Daggerfall on this, it`s system wasn`t very delighting for me.
c) Spellcasting. The newer games obviously win at this, although I also enjoyed Daggerfall`s spellcasting. The game with the worst spellcasting for me was actually Morrowind. But ofcourse lets not forget that we didn`t get any levitation in Oblivion, nor will we in Skyrim (I`m more or less sure that has been confirmed).
d) Quests. Now I know we haven`t seen any of the quests but I`m sure we can speculate a bit. Lets look at the mages guild quests. We know that unlike in Oblivion the mages guild is split into two: The College of Whispers and Synod. Unlike in Oblivion, you can actually be a necromancer in this game. And it is likely that there will be no mages vs necromancers, dark vs light in this game. With that, I think it`s safe to say the mage oriented quests will be better than in Oblivion. Here`s a small list of what games I think will have the best quests:
1. Morrowind. The mages guild quests are done well. The only problem with them is that some of them are not materially rewarding but you get three dwemer books along the way. These books can be used to investigate for the dissapearance for the dwarves (and you can do this as a quest if you speak with the archmage Trebonius). The final reward is the necromancers amulet, which is a must for every mage as it gives
Resist Normal Weapons Resist Normal Weapons 25% on Self
Fortify Intelligence Fortify Intelligence 25 pts on Self
Restore Health Restore Health 1 pt on Self
Spell Absorption Spell Absorption 25% on Self
2. Skyrim. No more dark vs light like in Oblivion.
3. Oblivion. These mages guild quests were mostly only about fighting the evil necromancers. The rewards were moderately good (some items were usable, like the absorbtion amulet) but you never discovered any good "secrets" besides how to make black soul gems. The last enemy, Mannimarco, is a bit dissapointing. Is this really the king of worms? The Staff of Worms as a reward is not so bad but you will barely use it.
4. Daggerfall. Quests are random generated and thus of poor quality.
e) Scaling. This was a big thing in Oblivion as it made players avoid leveling. We haven`t seen Skyrim yet but we`ve been told it`s the same system as in Fallout. So lets look at Fallout`s scaling, instead. Fallout had new monsters spawn at higher levels. Their HP wasn`t dependant of the player level.The only overpowered monster I can recall is the Super Mutant Overlord. Overall I think Fallout is balanced when compared to Oblivion. Morrowind`s scaling was the best in my opinion. With the difficulty slider on 100, the game would prove to be a challenge at low levels and yet when you had reached a high level you could actually get to the point where you became the best. There, ofcourse, remained some challenges such as the clockwork city, the tribune and Bloodmoon. You could also go on a massacre in Mournhold but get killed by the challenging guards there.
Also unlike in Oblivion, Fallout`s unique weapons weren`t scaled, which is a good thing. I always didn`t like the fact that I had to get to a certain level before I could do the quest to get a decent version of the artifact that I wanted. Morrowind doesn`t have any scaled artifacts either.
f) Monsters. If you think the best monsters are obviously in the more recent games then you should see what Daggerfall has. Especially good are the skeletons with their screams and ghosts who scream "VENGEANCE!". I think these are better than the ones in Oblivion. So here`s my list:
1) Skyrim. From what I`ve seen the monsters in there are quite interesting. Also... dragons.
2) Daggerfall. I was most impressed with Daggerfall`s monsters. They were actually scary.
3) Morrowind. Some of the monsters in this game were quite unique. Nix hounds? Bone lords? Corprus beasts? A welcome break from the other fantasy games.
4) Oblivion. Minotauruses and a unicorn. It felt like it was general fantasy lore instead of TES lore.
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My vote goes for Morrowind. Sure, Skyrim`s likely to be a good game but as good as Morrowind? I kind of doubt that.