Well, I know who I'd want to go to parties with here, and there's certainly a few I wouldn't... and luckily they tend to mark themselves out.
Anyway, I used to be well into this when I was a teenager. I played AD&D (when I had to), Call of Cthulhu (by far my favourite - especially the Victorian Cthulhu by Gaslight version, which we adapted into a pretty full on steampunk thing), Car Wars, Warhammer FRP and many other more obscure things , and I used to be a pretty good figure painter (good eyesight and a steady hand helps). I would probably quite enjoy it now, but I don't have the time.
I suppose I could have been out smoking, listening to gloomy music alone in my room, or skinning my knees on the icy rugby pitches but, call me crazy, I pefered having a social life that involved creativity and imagination. I'd say it's served me well. Most of the people I used to play with were intelligent and funny and were into these games because their minds were rather more restless and expansive than most.