I agree with most everyone's comments about Jadzia. To me, it seemed like the writers tried way too hard to make her interesting, and it just came off as forced. She was a genius with eight lifetimes' worth of knowledge, Sisko's oldest friend, a Klingon warrior, and nearly every male character was in love with her, but somehow she just didn't live up to all the hype. I never disliked her, but she was always my least favorite of the main cast. And I always gave an inward sigh whenever she was the main focus of an episode.
(SPOILER ALERT) Then, of course, she was replaced by Ezri, and I suddenly wished for Jadzia to come back. Sorry, Corporal Clegg, but I wasn't a big Ezri fan.