BTMRR - followed closely by HM, PoC, IaSW, and Space Mountain. I really like EE too, but I gotta do it a few more times before I add it ti my top list..since part of the joy for me is the memories each evokes.
IaSW was my favorite as a little girl. Riding it takes me back to what it was like to be little, esp. when I see other small kids enjoying it.