get a ds. psps are just really bad versions of ps3 games. theyll make you want to play the real game on the real console. DS games are unique and can be really addicting. Some games i would recommend are Pokemon heartgold, metroid prime hunters, mario kart ds, and wario ware touched.
P.S. I dont give a shit if you say those games are for kids, theyre fuckin fun. if i want to play serious games, i get on my xbox.