I feel the opposite! I am on Season 5 and still look forward to Quark episodes. They have a lightness to them that Star Trek lacks sometimes. Usually they bring much needed comedic relief, at least for me anyways. I still love whenever Odo tries to catch Quark in some scheme.
I also never get sick of Garak centered episodes.
My favorite Quark/Odo episode is probably "The Ascent" in Season 5.