If you go with "Feminism is the radical notion that women are people", then 'Buffy' - a show which takes its female protagonist seriously, shows her growing into a strong, self-confident and heroic woman respected by her friends and enemies alike - is very much feminist.

I agree with this. That's one reason Buffy is so important to me: her story is presented as important. She's the hero of her own life. That's a very rare and precious thing.

Of course, I often want more, but I'm thankful that this never wavered (well...except for the AR, which I would argue makes her story subservient to Spike's, but that's a whole 'nother issue).

And...I'm not going to comment on the rest. :D