In some sort of order since 1986:
Warhammer Fantasy Roleplay
Palladium
Robotech
Cyberpunk
AD&D+2nd Ed
Shadowrun
Star Wars
Ars Magica
World of Darkness
Call of Cthulhu
Torg
Deadlands
Härnmaster
7th Sea
D&D
... and now I'm back where I started with Warhammer Fantasy Roleplay 2nd Edition, still the coolest setting, with and improved system.
