It really doesn't matter what series, I love them all. Star Trek, Star Wars, The Matrix, Stargate SG-1, Stargate Atlantis, Babylon 5, Battlestar Galactica, nearly any Science fiction, preferably not horror.
Ok, and hear is one of the oddest things, I'm a woman who loves Sci-fi. I know mostly it's men who like it, but not me. I love it, and I'm a woman, so I'd like to hear from other women who also love Science Fiction. It's about time that people who create Sci-fi relize that it's not just for men any more. :)