I've been playing violent games since I was 5 years old, and you know what? According to my family and friends, I'm a kind, loving person with a strong sense of humor (albeit rather dark humor). It has been known to me that when my friends try to do natural friend-to-friend goofy violence (you know what I mean) that I react rather quickly and with moderate strength, such as an occasion when one of my friends tried to poke me below my kidneys (like I said, in a playful, friendly matter) I had him in an arm lock almost instantly. However, I don't think this is from video games, but instead the Karate lessons I took combined with how I really don't like to be touched.
I still, like you, enjoy games with violence enough to make me wince (see: Mortal Kombat 2011, which I am currently addicted to), but I think movies and what not could cause as much damage as video games.
I still, like you, enjoy games with violence enough to make me wince (see: Mortal Kombat 2011, which I am currently addicted to), but I think movies and what not could cause as much damage as video games.