-More stores (clothing etc)
-A Casino, nightclub...doesnt New York have nightclubs?
-Parachute (Definately) I wonder why they left it out? This should be included in an update rather than DLC
-Police missions should have you as a cop...instead of having the cops chase you when doing there work!
-Drinking without having to be with a friend (going into the bar knocking back a couple and having fun etc)
-new area....how cool would it be to take a flight over to vice city? an island retreat??