Really liked the show even though I generally don't like sci-fi! The movie was like a straight continuation/ending, so it was also great. ^^
I've tried Buffy though since some people have said that it's good in a similar way, but I just can't stand it. =/ It's just too cheesy/dorky/teens/90's. It's impossible to take it seriously, even though I *know* it supposedly gets better and deeper, and that it's got a great mythology/story.
Oh well.