I watched much of the Voyager series. I drifted away the last season or two. I guess I need to watch the last few episodes.
Eh... I watched Voyager because I was a huge Star Trek fan, but I never really liked it. (Eye candy borg, aside.)
I really liked Enterprise, but it turned into crap as well. I stopped watching when the Captain was thrown back in time. (To WWII and Nazis? I can't remember).
Star Trek hasn't really made anything really good in a LONG time. First Contact would be my best guess.
(/Checks timeline- Ah, I see DS9 had a finale in 1999. I'll go with that, then.)