Most descriptions I read of it are something I completely hate, and certainly can't relate to. I mean, they make it sound like a depressingly conformist person. I actually think there's a correlation between the social instinct (possibly sexual to an extent) and typology; given that typology deals so heavily with the human condition.
The stereotype for sp/sx is a brooding, melancholy, anti-authority loner - which to an extent I fit. Authorities and communities frequently irritate me by virtue of being completely superficial and shallow - an example of this was the MLP Community in the UK. I had a very deep enthusiasm for the show, and have met some interesting individuals in those circles. However, I felt a sense of inferiority from many people within the community, who were obviously a great deal more knowledgeable and accomplished than myself. At the time, I was suffering severe self-confidence problems and took that very personally; as I've grown I've come to realize my inferiority stemmed from projecting these individuals in a very false light. They're actually very arrogant and superficial; exactly the people I want nothing to do with. The idea of devaluing a community because I couldn't connect with them is something that most social descriptions won't account for. But that's not community spirit. That's just fitting in.
Just yesterday, I began planning a protest. Buses in my area are notoriously unreliable, with drivers stopping to smoke midway through a journey or even stop to chat to a friend. The timetables at every bus station are completely out so there's no planning in advance (unless it's a really late bus, those at least are consistent) and the last bus of the night on one occasion didn't even show up (despite the driver of another bus telling me it would arrive soon!) forcing me to walk back an hour's walk to my home. Oh yeah, and people always complain that buses drive straight past them, despite them signalling. Regardless, I'm sick of complaints and I want to take action. And I've always fancied myself as a fighter of justice, so I regard this as a test of my ability.
I associate fitting in with self-preservation. I don't like my personal interpretation of this instinct, because I believe it's about self-survival and is extremely inauthentic in its approach to being. I associate it with selling-out and being false for the sake of security; I'm a practising musician and my Mum all the time tells me I should write pop music because it'll give me money. I won't, because it opposes the very thing I stand for - to use art as a means of expression.
Oh yes, and I'm trying to understand typology so I can accurately type individuals. I remember spending so long looking for my type and being fooled by people's poor descriptions. I hate the simple approach to it that causes so many people to mistype, and I hate people who go around typing despite being mistyped themselves. It completely ruins the system and social structure, something I can't abide.
And by the way, I believe my instincts are So/Sx - possibly Sx/So. Being Sp last makes the most sense to me, but that's tainted by my biases. Or is it a bias against a de-valued instinct?