Crimson Skies is the only flying game Ive played, and its the best one!
Also the gameplay has a sort of GTA flying style because when your not on a mission you can usually just fly around and blow **** up. The graphics are good but when in a cinametic scene it looks too cartoony, which makes the game seem like it was for a kid. Above all though its a great game.
The multiplayer is fun, but only when lots of players are in a room together. Team Dogfight (I think its called) is the best.
If you have doubts you should definately rent it because this game seems like a game only for selective audiences.