DnD 4 (never liked the previous DnD-editions, but this one is brilliant)
WoD (both old and new, with the right people, I noticed you canīt play it with happy-go-lucky fantasy-larpers)
Apocalypse World (ah, this game has a lot to teach every gamer, itīs just a whole new way of looking att RPGs, also you should read "Play Unsafe")
Mutant and Coriolis (two swedish games, the first being a post-apocalypse world filled with mutations between animal and man, the second the most beautiful SF-game Iīve ever seen, like a combination of Star Trek and a Marrakesh street market)
and of course Star Wars Saga, great rules. And you get to be a Jedi... *grin*