I must admit that I actually like the Ferengi and I do like "False Profits" too. Most of all because we could see what happened to those Ferengi from "The Price" and also because I think it's OK with a rather funny episode sometimes.
Not to mention that I find the parody of capitalism and greed both funny and appropriate. It reminds me of greedy people I've actually met.
And Quark is one of my all-time Trek favorites!