After nearly 30 years and numerous attempts to watch DS9 I've finally made it past season 1! I'd run out of things to watch so thought I'd give it a go. Season 1 was still tough going - none of the characters really interested me and Sisko is just plain irritating. Season 2 got a little better and I enjoyed some of the story lines. I'm on season 3 now and, to my mind, it's still a bit patchy but I'm more invested in the characters and where the story is going than I've ever been before.
I hope my perseverance pays off as I'm looking forward to seeing why other people have said it's so good. At the moment, it's still only something to watch if I've got nothing better to do *.
* I've recently discovered that Babylon 5 is on IMDB TV so I've been re-watching that in preference to DS9 some of the time.