tough decision....link to the past was the first one I played, so it will always have a softspot in my heart for it, and the gba remake is more fun (multiplayer woohoo)
MM is cool, all the effects of the different masks is something to see. the only downside to it is having to warp back to permanently save your game, and just the long chains of events that you have to repeat is something of a pain.
Oot is the other good one, :wink: you actually get to see link all grown up, heh.
I guess I'm not too much help either, most of the games have upsides and downsides to them.