These were among my favorites:
1. JESUS WAS NICE - YOU BE NICE TOO
This is the homiliy we usually hear in our suburban parishes. Love = quiescene / Fighting for what you love = evil. If this theme describes what you're hearing ... it might be a bad homily.
Beware of homilies that start with anecdotes about cute crap. "A boy at camp whose mother sent him cookies ..." "There was a woman who found she had a terminal illness ..." Anything with a Reader's Digest flavor to it is probably from www.homilies-r-us.com, which is what I call the clearing house for shallow thinking sermons that fit easily into a template. If your priest sounds like he's beginning his talk with a canned anecdote ... it might be a bad homily.
3. DON'T GET IT WRONG, BUT DON'T GET IT RIGHT ENOUGH. [Oh this one is SOOO spot on! This is usually my most common complaint!]
This is very common. The priest doesn't say anything wrong or heretical per se, but he makes a huge implication about the nature of the Faith in what he leaves out of his homily, in what he does not say.
So, for example, if speaking on Our Lord's commission to the apostles at the end of the Gospel of John ("Feed my sheep" "Someone will lead you, Peter, where you do not want to go"), a bad homilist will focus on how important it is that we must care for the poor, and leave it at that. True enough, but what about Our Lord's promise to Peter that in feeding his sheep and tending his flock he will be persecuted? There's an edge to this reading that a bad homilist will always cut away, giving us the gelded interpretation.
This is akin to discussing "King Lear" and saying, "a daugther should be nice to her father". Well, true, but that sure leaves a lot out.
If your homilist Doesn't Get it Wrong, but Doesn't Get it Right Enough ... it might be a bad homily.
4. SHECKY GREEN PRESENTS
If your homilist tells more jokes than Heny Youngman with a fiddle ... it might be a bad homily.
He asks for readers' input, so feel free to go add your own!
Curtsy to Mark Shea for the link!