It's an extremely close call for me between TTYD and SPM but i'm going to have to go with the former. TTYD felt like something I'd never played before, and the way it all came together was just too perfect, the Bowser mini-stages were so worth it, Goombella is definitely one of my favorite characters, Chapter 6 (the train ride one) and Chapter 3 (Glitz Pit) were my favorites.
SPM i feel is an equally brilliant game, everyone slams it because its not turn based but it was just as awesome. The antagonists were simply amazing, Dimentio is one of a kind and i hope he returns like Fawful did in the Mario & Luigi games, Mimi was hilarious and so was Mr. L, oh and I've got to give a mention to the Brobot battle, genius, simply genius. The Pixl's were also too cool, Barry ftw. Not to mention i got to play as Bowser for most of the game, can't go wrong there.
The dialogue in both games were sublime.
I don't really know why but i didn't like Paper Mario 64 nearly as much as its sequels. It felt so slow and boring, and it wasn't nearly as funny or interesting, i did love Lady Bow though.
How technical is your game?
