i got hooked back in the day when Jon Pertwee played the Doctor,
then Tom Baker replaced him.
Baker was great as the Doctor and played the Character longer than anyone else.
sadly the show went down hill for ages but when the part was taken over but Christopher Eccelston... well I'm hooked again!
I've seen most of both the 2005 and 2006 seasons.
and I'm definitely buying the DVD's, along with the Pertwee and Baker years.

one of the things i got hook by the most was the original theme music.
it's mostly played on a Theremin, so i bought one.
not very good at playing it but i do have fun with it.