1)
Wii: Mario Galaxy, followed closely by SSBB (or vice versa?)
PS3: Heavenly Sword
360: Halo 3
2)
Wii & 360: Same
PS3: I'd like to go with HS again but Ratchet & Clank is an established franchise...
3)
Wii: RE:UC
PS3: Uncharted
360: Mass Effect
4)
Wii: Zack & Wiki
PS3: UT3
360: Not sure, perhaps Blue Dragon
5) Wii, hands down
Tag - "No trolling on my watch!"