So I have done 2 playthroughs of this game, thus far.

The first time, I was fighting for NCR, even though I didn't always agree with what they do. Guns + Energy weapon character.
The second time, I was fighting for independence. I was pretty much on good terms with everybody except the Powder Gangers. Unarmed-only character.

I have yet to do an 'evil' character however, which will be #4. I plan to basically fight for the Legion and help out everybody I don't like when I can and kill the innocent. What would be good for a Legionnaire characters? List the SPECIAL and Tag skills I should use for this.

And the last playthrough, will be an NCR playthrough. Yes, I was with them the first time around, but I was more-so helping them out. For this one, I wanted to more like a non-commissioned officers for the Republic.Use NCR armor, follow NCR rules, use NCR weapons, do all NCR quests. You get the point. What should my SPECIAL and Tag skills be for this one?

Legion isn't evil though so I wouldn't say it's a definite for an "evil" character.
So if you're gonna join up with Legion on 3 or 4 then make him/her different, think up a small backstory for your character that will influence how he/she acts throughout the world and then roll with it.

And what about House?

be a pure man of the wild.

very hard and hardcoe.

never use towns/vendors, never speak to people.

live off the land. eat the raw plants/fruits for sustenance... craft your own weapons and make your own meals.

live in a remote shack somewhere.

once a month journey to old lady gibson to sell the stuff you've salvaged. (junk, tin cans etc..)

Legionary (or Centurion)- Tags- Melee Weapons, Guns, and ummm....Sneak? SPECIAL: S-9 P-6 E-7 C-3 I-6 A-9 L-6 Pretty much the best i can do

NCR (Veteran Ranger or Heavy Trooper)- Tags- Guns, Ummm.....Repair and Barter? SPECIAL: S-6 (9 or 10 Veteran Ranger or Heavy Trooper) P-8 E-6 C-5 I-3 A-9 L-3

Do something you would not do normally.
Tag skills that you never would.
Raise stats that you never would.
Play to role if you're evilll don't help people for no reason lolly pops XP does not count.
Don't just use the best equipment.
Allways play with your own ideas.
Pretend you're in a fable, classic novel or fantasy story.
Allways ignore my unhelpful sugestions.

Skills for a Bee legion build...
Legionaire: Guns, melee, unarmed, survival.
Frumentarii: Speech, explosives, sneak, guns, lockpick.

NCR teddy bear grunt / trooper..
Guns, explosives, medicine, barter or repair.
These tend to be the most common basic soilder required fields in NV, the first two being standard training..

I figure for my evil Legionnaire character I shouldn't bother putting too much into Sneak or Speech as I have in the past, since I will solve my problems by killing them most likely.

I was thinking:
Survival, Melee, and Lockpick
S8, P3, E8, C2, A8, I5, L6
For my sociopath Legionnaire character

Unarmed > Melee in my opinion.

I heard that poisons ignore DT, so with Survival Melee is a good choice.
There is one that does like 13dmg/13sec, it's one hell of a lot of damage!
So if one has the patience to run around picking flowers and crap then go with Melee.
I'm too lazy for that though, so I just choose Unarmed since it's very simple.

I do that pretty much in real life anyway...lol... but yeah, in game thats a good character except sell yr stuff to pretty much anyone whos willing to buy imo.

On my next playthrough im going to go for a cannibal.

Going to start off as a normal person making their living, but then thrusted into a life or death situation where it is eat or be eaten. Obviously choosing to survive my character consumes flesh. Slowly through time the lust for flesh becomes stronger and stronger as he desires to eat fresher and better meat. Eventually consuming The NCR Presidant (i can't remember his name), ceasar, house and any other important character. Each time having the desire to try better meat.

Exactly what I set out to do this ... third time. Degenerated quickly and now I have Ronnie in Chinese stealth and the whole thing has turned to comedy with Rex leading the way.