Just watched The Chase for the first time and thought it was a lot of fun. Obviously there wasn't much of a plot, with the Daleks simply chasing the TARDIS around from place to place, but it was still cool seeing them pop in and out of so many different environments so quickly. In fact it almost had the feel of a New Series story in that way.
Another one I finally finished was The Mind Robbers. I had trouble getting through it once before, but this time I thought the story actually worked rather well.