I have three pet hates in photography, and one thing that's beginning to bore me:
1) Hatred of selective colouring, or any other technique. Fine to hate the resulting photo's, but the fact that the majority of selective colour shots are cliches should be seen as a challenge to surprise everyone using the technique, not a reason never to use it. One day, I'll manage that!
2) Slutty, obvious, unimaginative nude shots. I like nudes as much as any man does, but oh my god; you'd think some of these photographers would see just how old and unattractive the poses they're getting are, wouldn't you?
3) The pretentious insistence that PP is all wrong and you MUST capture it in camera, or you're crap! What counts, in fact all that counts, is what the viewer sees and feels when presented with the final result. OK, so when the purpose of the photo is to record fact, then it shouldn't be doctored, but other than that, what do I care how the pleasing image I'm looking at came to be?
And I'm getting bored with long(ish) exposure coastal shots, especially on 500px. I like them all and want to capture one one day, but they're ten a penny, and seem to dominate 500px (slight exaggeration maybe, but there are too many). Good example of point 1 above I recon; I could say I hate the technique now, but actually what I hate is that no-one seems to be using it to achieve anything a bit different.
Phew, I think I need a cuppa!