There are SO many great DS9 epidsodes! I've seen the series through once and I'm about to start re-watching it. I really love Garak, so of course I love "The Wire" and "In the Pale Moonlight." I also like "Paper Moon" and the episode with the baby changeling - don't remember what that's called. "Duet" is also great. I can't remember episdoes from the earlier seasons, but I know there were several from there I loved. I also like the episode where Kira takes care of the dying Cardassian man (Ghemor?).