Voted TRON even though it's not a favorite or even a must do because so short. But at least it is a thrill ride. Test Track inside is just a jerky dark ride then outside is no different than riding in my own car. DS loves it - otherwise I'd be inclined to skip it.
Tron for sure. Haven't been on Test Track 3.0 yet but was never a fan of it as to me it's no different than being in a normal car. Tron is different and a lot more fun.