As an INTJ, I don't seek out "casual" friendships, in fact, I avoid them as being emotionally draining. If I am going to expend the emotional energy to allow someone into my life, then I have decided that they are worth letting ALL THE WAY in, because I care about them.
OMG. I never thought about relating it to myers-briggs.
Depending if I am in a people liking mood or a NOT people liking mood? When I take it I am either Lisa Simpson (INFJ) or Mr Burns. (INTJ)
I suspect is an "I" thing. Now I have to go think about that. Thanks for the new HeadThink! I'll have to chase that new Shiny around in my head now.