Thank you. :) Tom Baker and Jon Pertwee are my favourites, following by David Tennant and Matt Smith. You didn't miss out on loads during the Peter Davison/Colin Baker/Sylvester McCoy era, though there are some classics you should track down, including Earthshock, The Greatest Show in the Galaxy, Ghost Light, The Curse of Fenric, and especially The Caves of Androzani (the all time greatest regeneration story in my not particularly humble opinion). :)