Man, why didn't I subscribe to this thread ages ago? I love ST. Here are some of my thoughts on the recent comments on the shows:
TOS: Never watched it, but loved the movies. I always thought the TV series was second rate until a few years ago when I started hearing and reading more and more about how awesome they were. The recent comments in this thread have made my mind up to watch them this summer (once I've finished all the good X-files episodes). With regards to the films, I love them all, even the "bad" ones, though I do think Generations is the least of them.
TNG: I grew up with this, and they are also the only series I have re-watched (twice) and own the DVDs to. I loved (almost) all the characters. I still think Picard is awesome, and I still quote him and follow his mannerisms to this day. Riker is the comedy relief mostly. I loved Data's quest for humanity, prolly one of the few "plots" that went through the whole series, though his brother was annoying. Tasha was an annoying wench, god I was glad when she bought it and Worf came in. Wesley, yeah I see why most hate him, while I don't love him, I do see the point to his character, someone who youngsters can try and aspire to be (though if it worked or not, god knows). Many great characters (O'Brien, Q and that archaeologist girlfriend of Picard's) and episodes (too many to list, but Darmok, and that episode where Picard lives a full life while trapped in some alien statis field come to mind).
DS9: The show was promising at first, but quickly went downhill - up until the start of the war. Honestly, I had all but given up watching it on TV back in the day until I watched a couple of the early war episodes and was drawn back in. Though I love Picard, Sisco is probably one of the best commanders (will reserve judgement for Kirk until after I've watch TOS), though I never liked his whiny kid. Odo was awesome. Loved him and his bucket. As was Quark. Quark probably made the series, and the episodes with his mother and the Ferengi leader are just pure gold. Then there's Garak, man, Garak is just the best. And then there is (or are?) the Daxes, the hot babes of the show. Loved them (as in I wanked my teenaged dick to them). The not so hot characters were mainly the doctor (at least at first) since he was just too much of a do goody know it all and Kira who was too angry and too religious, though to be honest, she did grow on me towards the end. Haven't watched this since it ended on TV, but I have to watch it all again.
Voyager: Mixed feelings for this one. As others here say, probably one of the best premises for a show: hurled out to the ass end of the galaxy and have to make your way back. No going back home to port if you get beat up bad, and they did do a good job of making decent episodes, but many of the characters pissed me off. Janeway had her good and bad days. The doctor was mostly awesome, though towards the end he had started to lose the awesomenes and started to become annoying. Never much liked Torres. Paris and Tuvok were ok in their own ways. Nelix... well... Nelix was pretty good but I fucking hated his voice. Chakotey... he was ok. 7of9... well, she did her job perfectly (read: she kept my teenage ass watching). I have no idea if she was a good actress or not lol.
Enterprise: Watched the first couple of episodes but for me it just wasn't Star Trek for some reason. I don't know why. (Anyone else have this feeling?) It just never clicked with me. Not much else to say.
B5: (OK, not ST, but everyone else is talking about it). Loved this show, though the 5th series was a bit dull. Lots of very interesting characters and character development (G'kar?) and ideas (Techno-mages). But probably the best thing this show did for Star Wars was to force DS9 to compete by introducing a steady multi-series plot instead of endless Monster of the Week episodes.
As for a future ST: Could it work? Don't know. Enterprise didn't work for me, though as I say, I don't really know why. It seemed to have everything. Maybe I'm just old and like my vintage ST? The new films are ... well ... They're good sci-fi flicks, but are they ST? Not sure to be honest. They seem more about the action than the adventure, if you know what I mean. If they do make a future ST TV series, I would watch it (at least the first few episodes), it might be good, it might be bad. Don't really know.
One thing's for sure though, I'm definatly going to watch the old films, TOS, TNG, DS9 and Voyager (maybe even Enterprise) again soon (by soon I mean once I loose my job, retire, win the lottery or find some more spare time).