The first season ruled, the second season was almost as good, and the third season finally kicked in a few episodes ago. I'm diggin' it now, but I missed the big death two weeks ago, d'oh.
HUUUUUUUUGE 24 fan here. Personally I felt the 2nd season was the best, I didn't watch it until my friend (even bigger fan) got the DVD sets.... so we would watch like 6 episodes in a row at a time, it was so awesome. Season 2 was absolutely killer the whole way through, the final stretch of episodes had so many "what else could possibly go wrong, goes wrong" moments, i was on the edge of my seat the entire time. Season 3 rules so far, of course. But now we have this whole month wait before the next episode....
And who doesn't love that little theme? DAAAAHHH...... DUH DAHH DUHHHHHHH DAAAAHHHHHHHHH.....
I got into the first season then missed a couple of episodes and never got caught back up. I always miss a chunk of the series and have to quit watching because I don't know what's going on. I'm going to rent the DVDs.