All his work is inspired. Colour is irrelevant to me - he captures both the looks and character of the Doctor(s) and tells a rip-roaring story. The Ten Doctors was a masterpiece. Even his Bugs Bunny As the Doctor cartoons are bizarrely brilliant.
I know nothing about the Forever Knight or Jem, but I'm finding both cross-overs very entertaining.
There are people who do wonderful things that we all believe we could do as well if we just worked really hard at it - learning piano, running 100m in under 12 seconds - and then there are people who do things that no-one else could think of doing. Sabalom Glitz trying to chat up the Rani? Sublime!