I don't generally watch any of the ST shows. I like X-Files quite a bit, haven't seen virtually anything of Sliders...though I can tell you now that the next big, nifty show to come along in the fantasy/sf genre is going to be "Neverwhere" by Neil Gaiman. I've seen a couple of episodes of it, and it's neat. Look for it later in the year or spring. (It's from the BBC.)