I played through Phantom Hourglass, Spirit Tracks, Ocarina of Time, Majora's Mask and Twilight Princess.
I hated the first two. Loved the next two and really liked the last one.
Now between OoT and MM...that's tough. But as a personal opinion, I'll go with Ocarina of Time. Majora's Mask was better objectively though. Technically better, a deeper story, different side stories. NPCs had more personality. It was better overall, but I found to like OoT better, I don't know why. And no, it's not the nostalgia factor since I played them one after the other and both have the same nostalgic weight on me.
Still, I won't vote until I play the ones I'm missing! Which I'll be Let's Playing once I have my shit ready.