That's exactly same order i'd have Iwulff...although Voyager and DS9 are pretty evenly matched in my point of view.
I loved DS9 because of the war. It was the most human of all the Treks - as Ringold said. It started off based on the death and destruction of Wolf 359 and the aftermath of Bajor's occupation. Then it went all happy as Bajor started to find its feet and the station grew in importance both militarily and economically. But then it went full-circle as the Cardassians pushed in, allied themselves with the Dominion, then went to war. It was a proper story and you wanted to watch.
Voyager had the storyline feel to a lesser extent than DS9, but it was still there - they were lost on the other side of the Galaxy, just trying to get home in one piece - and still with their sanity and morals in place. But Jneway knew that she would have to make sacrifices to do that, and I for one thought that her ability to break the Prime Directive so easily was actually one of her great strengths. They simply would not have survived on their own for so long without bending the rules where necessary to survive.
Enterprise was a good attempt, but it had something missing - it lacked direction and courage. It could have been so much more, but Paramount (As always) was too focussed on ratings. They forced through writer changes and believed the Temporal war arc would hook viewers. Yes, it made for good TV...but not good Trek. This one storyline killed off Enterprise in my mind. They should have focussed on the Romulan war - if they had done that, Enterprise would like be finishing through old age by now, not coz of premature production axing.
TNG simply didn't have that storyline feel to me. It was a series of unrelated but important events - tied up by the various (And extremely redeeming) story arcs such as Data. I also thought that Beverley was an extremely underused character. Gates McFadden is an amazing actress, but it wasn't until the season 4 episode "Remember Me" that they really started to use her.
As for TOS, I personally don't think much of it. Yes, it was the beginning of Trek. But that's it. It's old. The way I see things, it is actually holding Trek back now. They're on about Trek 11 being a Kirk story. All I can say is that I won't be watching it if that is the case. I simply don't care about Kirk anymore. Give me the future, not the past!
...And that's the end of my rant.
