what PSP game can you recommend?

Well I really must tell you that you should Definately pick up liberty city stories, and vice city stories of gta. They are so addicting and you can play it whenever you want. For action go with metal slug, and prince of persia rival swords. an RPG, go with Jeanne d'Arc which is a startegy rpg, and brave story which is also a awesome game. Also pick up dungeon masters if you can, great game where you create the dungeons to explore. Also pick up a burnout game for racing, sometimes exploding your car can be quite beautiful. If you have any more specifics of interest I could find you better games if you wish.

Need for speed carbon and NBA Live '07 are great games for psp. That's what i'm playing in my boyfriend's psp. This games are really good to play.

Metal Gear Portable Ops

I highly recommend Fight night round 3 and Prince of persia Rival swords. for RPG games I recommend the Legend of heroes series and kingdom of paradise.