What has gaming done for me?
Directly, it got me out of miniatures games and old AH/SPI boardgames...
Also it helped keep me sane during many times, even times when I had no fellow gamers around (...that was a very long two years...).
Given my campaigns, I have been forced to work on my organizational skills. I have been encouraged to read books of history, folklore, technology, ecology, civic planning, basic economics, arms & armour and the rest -- of course, many of these were of interest in some sense before, but gaming kept me at it!

And now my bookshelves sag majorly...
I have met many people through gaming and now have friends scattered hither, thither and yon -- all across the US, a few up in Canada, a couple in Scotland, England, and Wales, a fellow over in Brittany, and a couple of folks down in Australia. Yep, far-flung friendships, but all close to the heart.
My writing skills have also been honed, although you could put that down to my work as well.
In the end, however, why ask? Does anyone ask what golf has ever done for them? poker? knitting? stamp collecting? No, but for some reason there is still a need to
justify playing rpgs, especially if you are over 30 (I happen to be 45). "Gee, isn't that a kid's game?" My reaction: "Sure, it can be, but not the way I play it."
What have I gotten from rpgs? Fun!
