Let's see ... I tried Maplestory, Gunbound, World of Warcraft, Diablo II, KOTOR, CounterStrike, Day of Defeat ... and I ultimately went with Warcraft for like ... 5 years. Then Minecraft happened and I haven't gone back. xD
I don't have a PSP, but sometimes I play PS3 games. I mostly been playing Bioshock and Ratchet & Clank.