The Androids of Tara is so hard to get through. I like the 4th Doctor, but when his stories are bad, they're some of the absolute worst. I'd almost rather sit through something like The Curse of Fenris or Revelation of the Daleks again than finish this one (although its not nearly as bad as stuff like Greatest Show in the Galaxy), but I'm going to push through. People give Trial of a Timelord a lot of grief, but its about a 1000 times better than Key to Time, if for no other reason than that its much shorter.
Plus, it had at least two good stories, and so far The Ribos Operation is the only good part of Key to Time, outside of The Doctor, K-9 and Romana. I wish they'd gotten some stories of the quality of the earlier 4th Doctor seasons, I like the dynamic between The Doctor and Romana. It makes sense that the only good story so far was a Robert Holmes story, maybe that means that The Power of Kroll will also be good, which gives me more incentive to struggle through The Androids of Tara.