I'm going with OOT too. It's probably nostalgia speaking (but I'd definitely say WW was tons better than either), but I can sit down and still enjoy OOT today. The dungeons are still fun, as are the bosses, even though I know the game inside and out. In fact, the only drag is the fact that I killed my N64 controller's joystick, so making Link move right is a pain in the ass!
TP was just unmemorable. I played it straight through, and I remember enjoying it, but I don't remember anything about the game hardly at all. I remember Midna's transformation, that giant cannon, being a wolf, that stupid segment where you had to shoot people on Epona, and... that's about it. I can't recall a single dungeon. After I figured out my brother trashed our copy, I bought a new one only to find out it's really freakin' boring! I couldn't make it through the first wolf segment! It was just so tedious and dull!
Anyone remember those little covers that Nintendo gave out for the joystick so the rings on it wouldn't cut your thumb? I was one of those dumb kids who cut their thumb on the rings. I had a set of rings carved into my thumb for weeks.
OK, wait, just did some Wiki-research into the thumb-cutting handout. I thought I was making some of that up. Turns out, the injuries were caused by rapidly spinning the joystick when playing games like Mario Party. Remember how you'd use your palm to rotate it faster? Turns out it gave kids blisters and somebody sued. (http://news.bbc.co.uk/2/hi/science/nature/671601.stm)
Apparently I'm the only person with strong enough hands (and poor enough receptors to pain) to actually cut myself by trying to make Donkey Kong run faster.