Three TV shows worth watching: Chuck, which looks like absolute cheesy crap but it has great characters, and it's funny, and hey, it has Jayne! Battlestar Galactica, which pretty much everyone knows about now. Fantastic characters (that's mainly what I look for in a TV show) and thought-provoking plot lines. And last but not least, my current favourite, Torchwood, the show that makes me wish Leontine still worked for the BBC so she could design a cool box for the DVD and then send it to me. With the DVDs in it. Russell T. Davies is a brilliant writer who has created an ensemble of witty, subtle and interesting (oh, and gorgeous) characters and put them in a universe which keeps throwing horrible things at them. If you miss Buffy, this is the show for you.
Edited to add: (I mentioned this to Blake yesterday and he said I should post it. I guess any vestigial signs of intelligence should be encouraged.) Torchwood is the show Angel would have been if it had been better written and David Boreanaz was a better actor: it's dark, sexy, adult, scary, with lots of great one-liners and sex. Plenty of sex.
Jeez. Apparently I am not the first person to make that connection; Russell T. Davies was. Well, he did borrow Spike, didn't he.