I'm not a huge fan of Ezri, but I liked her more than Jadzia who I found too bland. Jadzia was always the single one DS9 character I never found interesting.
Never liked Ezri, but I did feel like that about Jadzia when I first watched DS9. Going back, she's become my favorite character. She's an odd one. I can't think of a single Jadzia-centric episode I like, except You Are Cordially Invited..., but I think she's a great character for others to play off.
Love Jadzia, hate Jadzia episodes.
This is prooooobably going to be an unpopular opinion, but I think many fans like Ezri mainly because she seems like a cute, dateable, nerdy girl next door type.