Tom Baker is like the British version of Dave Chapelle's impression of Rick James, except in REAL LIFE (and minus the misogyny). I can just imagine Tom doing all sorts of crazy shit that, if you put it in a comedy skit, no one would ever believe.
I love that his most frequent apology to people is, "You'll have to forgive me if I don't remember you, because I was terribly drunk at the time."