I actually rather enjoyed the Colin Baker episode Vengeance from Varos. And I drew a Colin Baker episode, though I can't recall which one. But I found The Leosure Hive boring and incomprehensible. The Caves of Androsani, from that same era, was much better.
But I have to confess I've never gotten the chance to see the most interesting Tom Baker episodes; most of what I've seen him in has featured brilliant acting on his part but was otherwise a bore. In contrast I've seen some thrilling Jon Pertwee episodes, like The Three Doctors. "I AM OMEGA!!!" But I've yet to see anything from the Seventh Doctor that was of interest. In contrast, the snippets I've seen of the black and white doctors look thrilling. I wish the BBC would remake somee of the lost First Doctor episodes, using the gentleman from A Journey through Time and Space, who looked convincingly like William Hartnell.