I have played (and used to own, until someone stole it
) GTA 3, but not GTA: Vice City. Speaking as the kid who read Stephen King novels and played Doom 2 at age 9, I can honestly say that games like GTA do not bother me in the least.
In case you're interested, there is a reason why some people who witness violence in media commit violent acts, while others do not. There are a number of things that must happen before violent images lead to violent acts:
1.Attention-the viewer must attend to the violent acts; that is, they must pay attention to the violent aspects of event/image.
2.Repetition-Although the exact amount varies, repeated viewing with attention increased the probability of violent behavior.
3.Reward-The viewer must see the person committing the violent act either rewarded or not punished for their deeds. This creates an expectation for the viewer of what will happen if they decide to imitate the action. Seeing a role model commit a rewarded/unpunished violent act is more potent.
4.Expectation-The viewer must believe that imitating the violent act will have positive consequences in their situation.
5.Opportunity-The viewer must encounter a situation in which they believe violent behavoir will be rewarded.
Of course, other factors are important, such as mental illness, abuse, etc.; but these are the important factors for the average person.
I hope that clears up some confusion.