I suupose that we all have our prejudices, and I must admit that I never much cared for Tegan. She always seemed to be complaining about something, and to me she came across as whiney. She did have perhaps the best leaving scene of any companion, though. "It's not fun any more, Doctor" I found unexpectedly poignant. (Lest you think me a hopeless case, I should point out that I really liked Donna.)