I have a PSP (had, it was recently stolen i think during drunk shananigans) with only two games (Lumines and Mercury). They are great puzzle games.
I have a 4GB mem stick in it. I DL PSP roms for free, NES SNES roms aswell. I can use the wireless capability to access my desktop whilst pooping.
Everyone else does this too, no games really ever have to be bought, maybe thats why sales are low lol
Burnout Revenge and GTA should be cool too, i havent tried them yet