My likes and dislikes:
Andromeda: It's pretty interesting and has lots of eye candy. For some strange reason, I like Kevin Sorbo in the role..
Voyager: People put this down a lot, but out of all the Trek series, I like this the best.
TNG: Like someone else said, it's too preachy, and the "technobabble" Geordi spouts is annoying.
DS9: Too much pseudo-religious Bajoran crap. Plus, the Federation couldn't run a war with the Dominion to save its life.
Farscape: Haven't watched it since the first season, but what I did see was quite good. Have to get back into this one.
SG1: I watch the occasional episode, and they're good, for the most part.
Babylon 5: The best, IMHO, without a doubt (except for the first and fifth seasons). The Shadows RULE!
Babylon 5: Crusade: Totally and completely lame. My understanding is the bean counters (network execs, etc.) intervened too much here.
Earth2: Haven't watched a full episode, but it looked pretty lame.
Lexx: Very stupid. Unbelievably stupid. Cheezy, corny, bad acting, and did I say stupid? But the chick is hot in a slutty way...