Crash Bandicoot is fun too, and if he's into sports, definitely FIFA/PES (whichever you prefer, I prefer FIFA). Ratchet and Clank has been mentioned but I'd second it.
If you aren't concerned about allowing him to play games for 18 year olds, Grand Theft Auto San Andreas is a must buy. It's a game that will never get old and will provide months of self created fun.