7. Custom Cars
What happened to the modification of cars after San Andreas? GTA IV offered plentiful of realistic, real life imitating cars, and that was impressive, but the option to modify these cars to our liking would have been impressive even more so. Im not just talking classic paint jobs; Im talking the addition of new wheels, suspension and nitrous oxide. Maybe even custom paint jobs - imagine drawing a giant Pac-Man on the side of your hummer limo. This should be essential in the multiplayer portion of the game where all you want to do is show off your unique car before having it blown by one overtly jealous user with a rocket launcher.