My group is two humanities academics, two computer/techies, an investment advisor, and a labourer. Two of the group have PhDs (I'll let readers guess which two), two have university degrees and postgrad tickets too (masters in one case, grad cert in the other), and two finished their formal schooling with high school.My group, in terms of personalities and proclivities, has one film director, and has and has historically had a bunch of people who would be character actors or technicians behind the camera.
Three of the group (maybe four?) play MMOs, another is into strategy-type games like Civilisation, and yet another (me) doesn't play computer games at all, nor really boardgames other than with my kids.
In the online game that [MENTION=6696971]Manbearcat[/MENTION] is GMing, there is also some diversity: Manbearcat seems from his posts to be a very physical, sporty person (lots of basket ball examples in his posts); [MENTION=16586]Campbell[/MENTION] is (as best I recall) a former soldier who is studying business on the GI Bill; I don't know much about [MENTION=386]LostSoul[/MENTION] and [MENTION=27570]sheadunne[/MENTION] outside of their RPG interests, but I can say that I'm not at all a sporty person, let alone a soldier (my writing on just war theory is from a purely theoretical perspective!).
I don't think there are any obvious correlations between education, other interests and abilities, and RPGing preferences.
I'd be surprised if there are any obvious correlations between other features of a person's social life and his/her casualness or seriousness about RPGing, either. (Not that you were asserting the contrary.)I said social and I meant casual.