Are you kidding? Homer's Enemy is by far the best episode the Simpsons has ever done. Almost every line from it is funny and quotable.
The hell are you talking about? Even if it is "funny", it's a dark humor episode that isn't a quote machine at all. It didn't help that I could actually sympathize with Grimes' plight towards Homer, and on top of that it seemed like this was the episode where Homer began to cross the line from "good-natured dimwit" to "dimwitted asshole" (see: funeral scene)
The warehouse subplot was pretty good, I'll admit, but hardly compensated for the main plot.