i enjoyed all seasons except 7, 1-6 seemed like a great build up that could keep going, each season surpassed the previous one and this was happening on a show that had some tough critics in the beginning. It took while to find it's flavor but when it did it was great. Now i know some of you think the first 2 seasons were kinda boring, but trying to find one's momentum as a show and keep it small for a while and still make good trek was a task. It had to be small for awhile, there was a general arc from the beginning meaning that these characters would eventually be big. The premis in the beginning was that they were on the outskirts of the federation in a not so glamours rickity old alien station. Then placing them in front of a wormhole caused the station to be an important place for exploration, commerce. Still far off enough that although important now, only scientists, the grand nagus or the ocassional thug would go. Sometimes we would get the occasional vistor from the other side. Then with the invasion and unification of the dominion and cardassia it became as sisko put it " the most important piece of realistate in the alpha quadrant." To watch the station and the characters' roles evolve because of this constant changing environment was great. All the way up to the end of 6, the S7 came it seemed they knew they were at 7 years and were supposed to quit, which they were, but instead of thinking of something good they wasted time with some episodes and poorly wrapped up plotlines with others, that is why i think viewers tuned out, if the surge of dropping viewers happed before S7 then I don't know why.