Ben is pretty picky about the games he will play. He liked Fallout 3 as much as I did, but he's not so hot on the full on shooter games like Halo.
I picked up a used copy of Mass Effect and he's enjoying that but it's a little sterile. He likes the combo Role Play & Shooter style but prefers killing aliens and mutants rather than humans, unless they're really evil humans.
Anyone have any suggestions for other titles he might like?