I personally am not concerned about murder or shock, but I think it's worth saying what many people think. Many games containing violence are probably made in poor taste. For example, it would be a red flag for me when meeting someone if their favourite video game studio is Rockstar Games and that's all they like to play. It'd be like saying their favourite TV genre is reality TV and they're proud to watch it constantly. It's OK once in a while, but I hope they often expand their horizons. Rockstar's modern games certainly have some value, but relative to many other games they feel like technically-impressive immature time sinks. My snooty point aside, violent video games seem not to correlate with aggression, but I suspect they at least correlate with some annoying personality traits. Some artistic masterpieces worth consuming contain a lot of violence, I just don't think that's the norm, so it's easy for outsiders to lump "violent games" together as a threat.