Well,
OoT first and foremost..the feeling of ascending the tower with the music getting louder and then the sight of Zelda and the horror on her face ( matching yours ), and Ganondorf's dramatic cape-sweep and then you are fighting the King of Evil himself. And the Ganon stage was nicely done, great music and everything.
I liked how they built up to that moment.
WW's didn't feel so much epic as much as "deju-vu"..but it was epic in it's own way. ( the sense of relief to finally finishing what was started in
OoT )
TP, the sword fight with Ganondorf was awesome. It was like: "fans we know you want a one-on-one dual with the King of Evil himself..here you go." That particular part felt epic.