[Wutang]

Agree with the social aspects - a good portion of my social circle consists of people I've met on the mats. Cool thing at least from my experiences is that a lot of the people you meet will be people you normally wouldn't meet otherwise meaning people from all different socio-economic statuses and ethnicities. If I joined say a co-ed sports league around my area I'd probably just meeting other middle class white collar people. One of my best friends I have I met from BJJ many years ago and I doubt I would have ever run into someone like him if it wasn't for BJJ given that I had a pretty sheltered, stable upbringing while he grew up in hood and went through all the BS that comes with it.