I hate to break it to you, but the PS3 has been raped in terms of exclusive games/franchises. Nintendo has more of them and so does Microsoft.
Wii: Legend of Zelda, Mario, Metroid Prime, Super Smash Brothers, Mii Sports, MySims, and a lot of other games an actual Wii owner could list.
Xbox: Halo, Gears of War (although it's being released for the PC soon), Forza Motorsport, Dead or Alive, Project Gotham Racing, Viva Pinata, Perfect Dark, Kameo, Dead Rising, etc.