What game should I buy?

For Christmas I got a PlayStation Portable and Star Wars Battlefront II.

Now I’m thinking I might like a new game for my birthday. What game should I get?

I prefer flying (spaceships, mainly, but also airplanes) to just running around. (I’ve already got a body in real life: I don’t know why I’d want a virtual one. What I don’t have in real life is a super-fast spaceship with lasers.)