With sp being a definate first i would employ process of elimation with the last two. IMO Jim craves intense one to one connections (albeit with very few) more than social oneness.... however, attempt to get too close and you'll be hit with the sp stick.
If there were a stacking sp/sp/sp that would prob fit best. Jim, like everyone else, has work to do.
This is a very crude explanation, it may serve better to look at the enneagram of 6w5 (which i believe Jim is) in conjunction with sp/sx for better definition.. need link.
I will attempt to go into soc/mbti type later.
I dunno, I don't get the impression that jim is as gruff as you make him out to be. Get hit with the sp stick? I don't see that.
But, for a certainty, back then,
We loved so many, yet hated so much,
We hurt others and were hurt ourselves...
Yet even then, we ran like the wind,
Whilst our laughter echoed,
Under cerulean skies...