I thought this would be as good a topic as any to start with a bunch of Whovians. There've been a lot of gals in the Doctor's tow, and a few guys too. So who's you're favorite?
Note: I'm going off the new series (since 2005) myself, only because I haven't had the time yet to get around to watching the originals.
I used to be a die-hard Rose fan, but Amy Pond is a wonderful amalgamation of all my favorite things about Rose, Martha and Donna. She's spunky and awesome, and cute as a button, which doesn't hurt.
Jack Harkness is pretty awesome too, btw.