Might be some element of selfishness involved... or a "not casting your pearls before swine" kinda thing.
That sounds like a harsh assessment of an audience, but it's pretty tough to keep offering examples of your own work if they aren't seeming to be valued. That feeling is definitely there a bit with myself and with a few others I know.
Yes, you do tend to tailor your sets to what you think (or, later on, know) will go over better, but it's only human nature to want to be a bit protective of your "offspring", non?