I know that there are many genres of video games on the market but there are really only two categories that they fall under - First Person Shooter or Role Playing. If you meet a gamer for the first time and ask them what they play it will be either of those two. I am personally a RPG fan. I don't have many FPS games on my shelf. It's not that I'm bad at them, it's just not my style. My preference goes even further to combat style and game layout. I won't play Final Fantasy or anything similar and I won't waste my time on Elder Scrolls (sorry!). There is definitly some rivalry between FPS and RPG players. Gamers generally get along very well until this topic comes up. The two sides just clash. I don't know if there is some sort of psychological reason behind a players personal preference but here is my take on the two sides:

FPS games usually don't require any kind of strategy or skill although die hard FPS fans will fight me on that point. You usually play only being able to see your characters forearms and whatever weapon you choose. You follow the story line completing missions of some sort and shoot all the bad guys. The only real complaint that I have against FPS games is that they are literally a dime a dozen. Every video game manufacturer has created a few, and the sad thing is, because they are so easy to create, they generally have no replay value or they are too boring to play through the first time. This definitely does not apply to every FPS game ever made, but there are too many failures floating around to make me want to play.

When I get in the mood to shoot up large quantities of baddies, I'm usually stressed out, anxious or just in a bad mood.  What does that say about the people who play FPS games full time?

I have always prefered RPGs over FPS. Why? Because with an RPG, you get to live someone elses life for a while, solve their problems and become the hero of time. You don't get some sort of kill record or medal, you literally save the world! I like to be able to explore and conquer - if only in an imaginary land. Some RPGs allow you to customize your characters looks, abilities and attributes. In Fable, you control the outcome of the world by your actions, which provided RPG'ers with a chance to truely be good or evil. 

I don't play many games these days but when I do it's almost always an RPG.  So, from what I said above about what I like about RPGs, I guess most RPG'ers are trying to avoid their own issues, escape from life and be acknowledged.  I guess the world really is in trouble!