Explosive Ammo should enter their body then explode sending shrapnel through their body. Also buckshot looks like its the standard shot for any shotgun, looking at the spread of the shot theres only maybe 5-7 shots which is close to buckshot

FEV isn't a harmful drug if you know what I mean, like it would kill it would strengthen the enemy

Do you even know what FMJ is? its Full Metal Jacket which is the correct term for a penetration bullet, AP could also be used. FMJ is commonly used every not only CoD. And FMJ was standard in Fallout 1 so fallout is like that and it does work for fallout, stop being ignorant and do your research. But I most admit Electric and Incendary are a bit bizarre, this isnt Bioshock

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Personally, I think it would be kinda cool if they had, say, 2-3 ammo variants for most guns (a few exceptions, laser guns, heavy weapons, ect), but to me it's not a big issue.

Rocket propelled lightsabers!

Teeth. A very hard ammo type to find. People often aren't willing to sell their teeth for use in a Dental Cannon.

Althouogh nearly every mammal I kill comees with 20-30 of them

Well, they have the smaller and larger varieties. But the Rboco Dental Cannon fires primarily the teeth of humans age 20-55. The other teeth are for use in the Denta-Flachette.

Ammo types would be nice, but just not the ones you described. Most of those were pretty stupid. You could change arrows in Oblivion, so it would be pretty cool to be able to switch out you ammo in New Vegas. I'm just thinking simple ones like hollow points that do more damage against unarmored targets, armor piercing ammo that ignores part of the enemy's DR and, and incendiary ammo that does extra fire damage. I'm not exactly sure how they could have different ammo with energy weapons, but it would still be nice.

If you played fallout 2, you would know that EC ammo was in it and FMJ and JHP ammo. It was a great thing in fallout 2 and I was dissapointed to find out they did't use it in Fallout 3.

2mm for the Gauss Rifle and any other Gauss Weapons

and the .45 cal

It uses a power cell. You can have different power cells with different voltages. Example 50vdc Power cell does less damage then a 90vdc Power cell.

Armor Piercing High Explosive Incendiary, Nothing is more satisfying then busting through your opponent's armor and also blowing them to hell with explosives. :tops:

http://upload.wikimedia.org/wikipedia/commons/f/ff/Mk211_Raufoss.jpg

Bean Bag Shot(Shot Gun only): Stuns the enemy doing 0 damage common and cheap

I would like it if you could change the color of flames for flamethrowers and other fire type of weapons... I wanna burn people with blue flames P=
(Also @Silvereage Bean Bag shots are already in the game)