Do you think that violent video games result in increased aggressive affect?

Yes, and even some video games of non violent nature can cause damaging affects, but its mostly the violent ones that bring out aggressive nature in some people. Video games, especially the violent ones (GTA, Halo, etc) are also some that become the most addicting; much like how someone can become addicted to alcohol or drugs. If you try to remove the object, it often creates the same reaction you would get from an alcoholic or a druggie; aggression, violence, etc. Also, some individuals see the video games, become influenced and sometimes starstruck by them, and either think that the violent nature of the characters is cool and start acting like them, or think it to be normal behaviour and react the same way as the latter. Some develop other conditions caused by the video games (insomnia, for example) and without proper sleep the individual can become disorientated, confused, and aggressive. Overall, I think violent video games in moderation is fine (as long as the person can tell the difference between reality, and video games)