Quark I hate. Not just because he's ferengi he is just an absolutely horrible person. Literally noone likes him, he is never supportive or even happy or anything. And he gets WAAAAAAAY too many episodes and they are all exactly the same.
I like Quark.
He wasn't written to be like any of the other original primary players, and he was sometime the insightful voice in an episode. He saw things different, and wasn't afraid to make commentary.