I think Garak was one of the most interesting Star Trek: Deep Space 9 (ST:DS9) characters – Star Trek DS9 – Episode 218 – Elim Garak is no simple tailor…: https://www.youtube.com/watch?v=Wd1UcxQg0-c (around 1:42 minutes long).
I wasn’t too much into the series when it first came out so I think there are plenty of episodes that I haven’t seen. I did come to appreciate the series because it had a story arc that was missing from Star Trek: The Original Series (ST:TOS) and Star Trek: The Next Generation (ST:TNG). The earlier series both were more of a group of episodes that had limited connection to each other. With ST:DS9, the series developed a timeline and you could expect to see some things carry over through multiple episodes.