Myself I think DS9 was pretty good. I liked the multi-episode story-lines, rather than having every episode self-contained so that they could be run in pretty well any order.

I'd imagine that would in fact be the very aspect of it that other people would specifically pick out as something they don't like about it.

I suppose there are two ways in which people can differ in how they like anything - music, sport, politics, anything. One way is when they both basically have the same ideal of how it should be, but disagree as to how far this is approached, in a song or a tune or a game or whatever. You'd be disagreeing about how good something was, but you'd both have the same idea of what it would mean for it to get better.

The other is when there is a more basic disagreement about what the ideal would be, which might mean that getting better for one person means getting worse for the other.