magicofrealm:
I know personally that my "ideas" and "beliefs" about life have changed just through roleplaying. For me, and I am a "serious" roleplayer who isn't some sort of cultis ;), it gives me a chance to theorize and be someone else who believes something else... and has helped me evolve my interpretations of my bible that I have now. When you 'become' someone else, you think diffrently, and when you think diffrently, ocasionally you get a really good idea about something that isn't related to the game at all.
Kudos to that. Once I started gaming, I had to see in the perspective of the characters I played. When I started, I was given roles to play, I didn't make them myself.
Most times I was given characters so unlike myself. And to become a good roleplayer, I had to understand the why's of the character.
RPG taught me to think, to question, to form my own conclusions, as well as respect that of others.
But one cannot say that gaming was the only influence. I had books, and I had friends, as well as family. It just taught me how to handle differences in a constructive manner.
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I'm sad to note, though, that I have seen players caught up in their own characters, such that their personality in and out of character merged. We try to discourage that. So, as a group we do other things, like go bowling, or watch a movie together, or mingle with other people (ie conventions).
In relation to religion, though, I have not seen anyone change their religion based on a game. I think it takes more than gaming to change somebody's mind about religion. They need to have a coach, someone to explain the intricacies of religion before they make the leap of faith.