It's not that I'm 100% committed to MBTI personality typing but
   "it's been said" that guys who 'tend to' go to philosophy groups
   online are of the INTJ type. I don't know if it's true or not,
   but having joined Philosophy groups _precisely_ to comprehend a
   personality type that I was previously lacking in experience
   with, I found strong evidence of it, even if the theory its
   based upon may be sketchy. To me it's a personality sorting
   mechanism more than anything, a bit of interesting fun.