1) WoZ
2) Star Trek
3) Tron
WoZ is a game where I feel like I have more to do the longer I play it. The biggest problem is you feel like you're in jail when you start the game. Once you start get a multiball or two, now the other multiballs are lit, rainbow is close, just three more rollover for ECMB, etc. It gets more fun the deeper into the game you play.
Star Trek just feels too easy in the same way as Transformers. I don't feel like there's any risk reward to the game. Hit these ramps, return to flipper, hit these next few ramps. It's really satisfying to build combos at the start and becomes less fun to play the longer the game goes on.
Tron has CV syndrome for me where it feels like it can be 'solved'. Once you know the exact sequence of events that will lead you to Sea of Simulation, you just do that over, and over, and over.