AoE II is my favourite of the series, by far. Played the shit out of it as a kid.
Also, this game is majorly nostalgic:
I never actually owned it, but played it at my cousin's and under rental from the video store all the time. Such a fun game.
Probably my favourite game ever.
And, finally:
I realize that most of these are N64 titles, but who gives a fuck. They're old, and they're classic.
My favourite Zelda game, for sure.