ive noticed something similar to that and i think that i know what it is. Lately ive been tend to lean towards tricks that are more difficult to do and not necessarily harder hitting. Tricks that fool magicians. For example ive gotten reactions with the biddle trick that i have never gotten with the queens from laymen.
They dont care they just want what seems the most magical and sometimes we get away from that. or maybe thats just me...
I could say that audience's are becoming de-sensitised to magic through mainstream television magic, but to be honest, it's probably more to do with the fact that you're not performing as well as you once did.