whether you want to answer based on single instincts, stackings or both is up to you.
on a preference level, I really don't like it much. something about it doesn't sit well with me on a visceral level; however, I also realize it can it in quite useful in areas I am inept at handling. If Self Preservation types are adept at managing the resources they have effectively, Social types are adept at exchanging and acquiring new resources. whether their objective is to contribute to a given institution, benefit from it as much as possible or both, they excel at it.
probably my favorite instinct. Sp doms are responsible, hardworking, survival oriented and probably hold the most realistic world view of the three variants. on the flip side however, they can become boring, workaholic and freak out about things that are, in fact, not really a big deal.
Exciting, energizing and sexy, but, in my opinion, their impulsiveness and lack of realistic perspective and expectations gets in the way of things. also, the constant desperation, feeling like part of you is missing and seeking merging of energy (preferably with a romantic partner) with another person can get really fucking frustrating sometimes.