I don't like them much, but they're not the most annoying thing in the whole world. Still, I think games would be better off without them. I have never felt that a QTE added anything to a game, it just distracts me from paying attention to cutscenes because I'm worried about "oh shit, my thumb's on x, but what if I have to hit b!" If your cutscene is so boring that you need to break it up by making me play a button, then change it or cut it. QTE's do not immerse me in the gameplay, they were cool the first time I saw them in Shenmue, but they very quickly lost their appeal, and now I can't help but feel that they just make gaming more annoying.