Yeah, body disposal should be an important part of the game, killing people without immediately building up a wanted level. Also, if you kill a lone cop without anyone else seeing it, why do you still automatically get a wanted level? They need to fix that. Someone should have to call 911 or find a cop before you get a wanted level. When someone calls the police, the search radius circle should pop up immediately, but if you leave the area before a cop shows up, you don't get the wanted level. I just want a lot more realism when dealing with the police.
And of course, I'd like a little more customization. I don't want anything ridiculous like the San Andreas customization, I just want some reasonable options for my character's hair, facial hair, and tattoos, in addition to the clothing options, which I felt were reasonable in IV. I would like the next game to take place somewhere warmer though, so I'll have clothing options beyond coats and army surplus rags from Serbia.