For the most part, I hate QTE's. God of War did them well, specifically since most of them are completely voluntary (apart from the boss battles). Prototype did them poorly.
Though, one the biggest annoyance/grievance/etc. I have in games is piss-poor dumb-ass AI. It's no fun if your enemies are to stupid to to take cover or charges at you across a wide open room without firing their weapons. And it's extremely annoying to have AI teammates that will run right into your line of fire and getting themselves (sometimes making you loose the current mission) or in the event of a botched grenade throw (from me) have your teammates stand around like fenceposts and get themselves blown up.
The other major problem I have is buggy or inconsistent hit damage and aiming. It's maddening to have to deal with enemies that can repeatedly hit me dead on half an in game mile away while behind cover and using a shot-loaded (rather than slug-loaded) shotgun when I can barely put two rounds into them from less than a tenth of the distance out in the open, crouched down and using the fine aiming and sights. Soldier of Fortune: Payback was the worst offender in that regard.
Though, one the biggest annoyance/grievance/etc. I have in games is piss-poor dumb-ass AI. It's no fun if your enemies are to stupid to to take cover or charges at you across a wide open room without firing their weapons. And it's extremely annoying to have AI teammates that will run right into your line of fire and getting themselves (sometimes making you loose the current mission) or in the event of a botched grenade throw (from me) have your teammates stand around like fenceposts and get themselves blown up.
The other major problem I have is buggy or inconsistent hit damage and aiming. It's maddening to have to deal with enemies that can repeatedly hit me dead on half an in game mile away while behind cover and using a shot-loaded (rather than slug-loaded) shotgun when I can barely put two rounds into them from less than a tenth of the distance out in the open, crouched down and using the fine aiming and sights. Soldier of Fortune: Payback was the worst offender in that regard.