The one you would choose above any other game.. any day.
I'm sure some will choose a Zelda game, but I know some won't, in my case well.. (No offense

) Zelda is nowhere near my favorite game, don't get me wrong it owns, best Single player game ever, but well I'm an online games guy.
I would kill for a Wii or a DS so I can start playing them, but well playing with my brothers and friends is funnier than kicking Ganondorf's ass.
So..mine would be Shadowbane, an awsome MMO PvP game, the best PvP MMO game if I may say so.
Besides would be cool if someone else play it, so I can play with you
So what about you?