I'm not a big fan of Buffy or Angel, Angel4576. I could never get into those somehow. But then I'm not that big a fan of fantasy really.
Concerning Farscape, one of the things that really put me off that show (among other things) was the type of aliens they had and the way they looked (yeah, I know if sound superficial but getting past that was always hard for me). Is that similar on Firefly? From the screen caps I've seen so far, I've only seen human players. Is that the way the entire show is?
Also, I'm not a big fan of anime either and unfortunately haven't seen the two you mention, Delsaber. So I can't really speak to that.