Stormborn
Explorer
Star Wars Saga is becoming that 2nd love, although up to now its d20 Modern. Not that I havent played other things. GURPS was fun, but we all but ignored the system most of the time. A section of Masks of Nyarlothotep played as a half-demon ex-cultist rogue Watcher and a slayer via Buffy's Unisystem was also fun but not significant. Uknown Armies probablly comes closest to a radically different system that I would love to play, but it really requires the right group.