Any Doctor Who fans?

It's my favorite TV show, and my screen name actually comes from a Time Lord character that I created and write short stories with. I thought it would be pretty cool to strike up a conversation about the series. Who's your favorite Doctor? Who's your favorite companion? Do you have a favorite episode? A favorite villain?

I like William Hartnell from the original run and David Tennant from the current run. Amy Pond is my favorite companion (and I'll admit that her red hair contributes greatly to that). My favorite episode and villain are tied together, because I like "Blink" and the weeping angels.

Any other fans feel free to jump in and make any other comments you might have about the program.