What sorta games are ya interested in? Fave genre?
Might get more appropriate answers
But until then, games id recommend are:
7 Wonders
Tomb Raider Legends (better than anniversary imo)
GTA:LCS (better than VCS imo)
Hot PXL is alright - better than WTF imo
If you like platformers like Crash/Spyro, you should check out Kao Challengers too. Normally a forgotten game, but, has to be like, the best platformer for the PSP imo - better than Ratchet & Clank, and Daxter.
But R&C is worth checking out