every game is a quicktime event.
Press B to jump. Press A to attack. Attack at the right time, and you win.
The only difference between any other gameplay and "QTEs" is that QTEs break the fourth wall. They say specifically "Press B to Not die." Whether this is a bad thing or not, I don't know.. doesn't bother me, but if it makes an awesome cutscene something that I'm contributing to, it's much for the better.
my only problem is the QTEs in Assassin's Creed 2. They appear in the middle of cutscenes, and even though they don't usually have anything big as punishment for failing (Usually the scene just plays out a little differently) it sucks to miss them. I left Leonardo Hanging when he tried to hug me.. and I totally would have hugged him, but I didn't notice the "Press B Button" in the middle of the screen.