id like more barbers and somthing new like tattoo shops in fallout nv also an option to shave. and maby outfit modding what do you think

Gamebryo may not be able to implement it well, hopefully in Fallout 4, go put this suggestion in the FO4 suggestion thread in Series Discussion.

Tatoos and facial hair is doable in the game. Haircuts are too, in fact FO3 offered that, but I have not found someone in NV to do that yet. This can all be done by starting up the Face Gen to re-roll your face. If you are on PC, you can even do this with the console. (just create a forked save first as pulling the char gen menus up on an active character can have weird effects that sometimes don't show up until you save and load again)

Body mods, anything that would change the shape or weight or height of the body is problematic. All the clothing has to be created for the the body type that exists. Once you start changing the body, then the clothes will not longer fit or you will see weird clipping issues or shoulders sticking out of your shirt.

You can get hair cuts by someone in the Kings if you join them as a reward for GI Blues.

Tattoos would be cool. (but not the shops) Like if you join a faction you get their mark, ala Metzger's Slaver Guild.