I've never been a huge fan of QTE's. I used to enjoy the breaks in gameplay to watch a cutscene. But now, I have to ready, because at any moment, someone tries to drop a boulder on my head unless I press L and R repeatedly.
I think user triggered ones, such as executions in God of War, are pretty sweet. But way too many games are trying to throw them in nowadays. Or maybe I'm in the minority? I don't know.