I like the ones that make sense. You know, the kind where you're watching a cutscene, and suddenly, a huge boulder comes rolling down the hill at you, and you've got about half a second to hit the jump/dodge button to avoid being crushed.
The ones I can't stand are the kind that take control completely out of your hands, like in The Force Unleashed's major lightsaber duels. You're prompted to press a button - ONE button - and Starkiller launches into a series of admittedly spectacular moves that might or might not actually be possible during gameplay, essentially taking the best part of lightsaber duels, striking the killing blow, right out of your hands. That kind of QTE, to me, seems to be less interactive and more "press this button to play the next scene of the movie".
And yeah, I hate the kind that prompt you to press a button repeatedly. It's like someone got Mario Party in my Arkham Asylum, I swear.