Okay, TV SHOWS: Farscape, Doctor Who, Stargate. That is if you're going by a very strict understanding of sci-fi, I know some terms can be a bit loosey-goosey (I'm looking at you SyFy). I liked BSG in the beginning but it just was so very depressing ALL THE TIME I had difficulty keeping up with it. I also enjoy watching X-Files but I keep forgetting that I've been trying to watch the entire damn series ever since I got netflix a few years back and so now I totally forget where I am in the damn show and am going to have to start all over again.
As for sci-fi books, I don't really read fiction very often. I usually read historical books, science books and graphic novels. There are of course the ubiquotious and amazing YA books, but they generally are fantasy and supernatural than actual scifi.