Jeff O'Connor wrote:
5 > 6 > 7 > 4 > 2 > 3 > 1
Hey, not too far off and I can totally see where you're coming from with everything.
2 and 4 do tend to fluctuate back and forth for me.
4 is higher on my list because it's the first season of DS9 that was really consistent. It didn't have episodes that were the same level of awful and the quality didn't fluctuate that much, which made seasons 2 and 3 pretty frustrating. Season 2 is awesome when you look at the best episodes - overall it has more awesome episodes than 4 - but it has some really weak episodes in the middle.
The best "season" starts with Things Past and ends with Sacrifice of Angels. The opening 6-episode arc of season 6 is great, then it gets diluted, though there are several excellent/great episodes. I can see why you'd put 7 first - it sustains the momentum better with the final arc, because it's longer and because it's the end, and there are several other great episodes, but for me it's too marred by the whole Pah-wraiths and Sisko's Prophet Mom thing.