Agree on TOS and TNG.
TNG in particular is hard to re-watch. A drinking game based on "reroute power from the" would probably kill the hardiest drinker within a few episodes. It did have a surprising number of really solid episodes though, and while boring and predictable, the rest of the show is generally watchable.
You didn't miss much with voyager. They went way overboard with the whole strong female lead thing, and created an all knowing all powerful and totally unbelievable character with Captain Janeway. They then surrounded her with cardboard characters and a central plot that held no tension (lets face it, no way they were getting home by the end of the episode.. ever). It had a few ok episodes, but unlike TNG most of it is just unwatchable dreck.
Now DS9 is where I disagree. Yes it was a cliche war story, but it was a well done cliche war story. Also unlike the other ST shows the characters actually had, well, character.. and there was an actual ongoing story arc, and the civilizations they ran into mostly made sense because they wern't just there to make some point within the span of an episode.