Eh, that's debatable, too. People spend their time in weird ways. It's becoming more and more socially acceptable to game more openly, but it really shouldn't be a "hidden" thing to begin with--why be embarassed? I mean, some jerkass decided "Oh, you enjoy playing videogames with people online more than going out and meeting people. You have TOO MUCH TIME ON YOUR HANDS." Those eight words have ruined so many things, including gaming. But that's a whole different topic.
That's the part I was specifically targeting. "How does one describe that experience?" Simple. "I played my game, and lost my achievements. So all that time is gone, and I have nothing to show for it.", which, when you get down to it, is part of the core of gaming anyway--killing time for fun. It's not bizzare, any moreso than homosexuals or fluently quad-lingual people. Sure, it's not the norm, but it's not like the guy needs to go to a freak show.