I actually enjoy well-done QTEs, especially when they help spice up what would otherwise be a repetitious boss-fight. Take God of War, as an example. Plenty of button-mashing combat to go around in that game, but the QTEs in the boss fights allow for some really spectacular visuals without disrupting the flow of the game. If anything, they provide some much-needed breathing room during the fight.
What I don't like, though, are QTEs that force you to do them over and over and over again until you succeed. If you blow it, there should be a consequence - even a minor one, like not getting a bit of swag or as high a score - and then you move on.