The thing I hate most in video games.

Having to continually adjust the volume.  I really hate it when cut-scenes are way quieter than gameplay. It totally kills the mood of the game when you have to turn the TV way up just to hear what the people are saying and then turn it way back down because the actual gameplay is much loader then cut-scenes. I hate playing with subtitles on, because you end up just watching the subtitles instead of the game. Messing with the sound options never fixes it either, because everything is turned all the way up by default. It's not just games either ever flip around the channels and hit that channel that's 10x louder than the last one for no reason?