I continued rewatching DS9 again, getting close to the end of Season 4 already. Seasons 1-3 were pretty bland, but season 4 has had some really good episodes. Little Green Men and Our Man Bashir were good fun, and Hard Time was the first really good serious episode (okay, after Duet).
Getting Worf joining the cast seemed to really help the show. Even though I dislike the Klingon centered episodes, having Worf as one of the main characters makes the show much stronger. Not sure why this is, maybe the writers knew how to write Worf already from TNG... And I guess more Worf means less Dax, Kira & Sisko, so it's all good.
The Ferengi eps have been pretty good, but there's quite lot of them already. They must have been pretty popular because they kept making so many of them.
And the Mirror universe episodes are just dumb... TOS and Enterprise made them much better.