Gotta agree with everyone here. Mass Effect (especially the first one) will be a treat!
152 PS3 games - 564 PS2 games - 72 PS1 games - 202 PSP games - 11 PS Vita games
Over 1,100 games total
Mass effect trilogy over the AC trilogy. Only because playing each Mass efffect game will take you 100's of hours each. AC trilogy is good, but isn't quite as deep as Mass effect IMO. BTW, isn't it great that PS3 owners can now play Mass effect 1? Fantastic.