I think that the next GTA should be based on Florida but you can also visit Vice City, SA, Lib. City.
You should be able to play with any character of your choice from other gta games. eg. Tommy Vercetti, CJ, Sweet, Big Smoke, Diaz etc.
you shud be able to blow holes in buildings wiv rocket launchers.
u shud b able to turn off the features in San Andreas like hunger, fat, muscle, stamina, driving skill etc.
petrol and fuel is a crap idea cos it wud b boring
you shud only b able to earn money on missions
skateboarding mite b an idea
snow
not huricanes or volcanoes or anyfin
mor weapons
all the radio stations from the previous 3 games shud b available
the map shud not b any bigger cos the great thing about lib. city and vice city was being able to know everywhere.
i did not think the graphics were up to standard in san andreas.