While I think the Best Disney Ride doesn't necessarily have to be my favorite...Tower of Terror is it, overall.
Second would be Splash Mountain, for some reason, whenever im at the top of the last hill and I look out at the castle and over the rest of Disney it gives me such a nice feeling, until the next second when splashdown is imminent!
Third would be...PeopleMover, oops, TTA.
I've always loved the TTA, even though I am more fond of the idea that Walt wanted to use it for, (His test city, the original EPCOT) I loved it as a kid, and it's just something unlike any other ride. You get a great view of Space Mountain and now Buzz Lightyear, but I remember when you could oversee the most spectacular view out of DreamFlight/TakeFlight when it was still around. I wish they had one go around the whole park, though when you aren't on the ride it would look a bit out of place I guess