BTMRR never, ever gets old! I could go 'round and 'round all day and night and never mind.
I also love Carousel of Progress (you can't imagine how I was able to annoy my parents as a child...6 times a day.), Pirates of the Caribbean, Haunted Mansion, Test Track, Spaceship Earth, and Rock'n'Rollercoaster as well as the TTA.
Mickey's PhilHarMagic never ceases to amaze and entertain me, either.