https://oceanmoonshine9.wordpress.com/five-stacks/
The reason I don't like the OP description of the 5 Sx is that it misses a key point, and that is the Sx instinct in general focuses on the significant other. But the OP description doesn't even mention it.
If I was new to this and had to choose between the three type 5 instincts listed in the OP, I would be hard-pressed to do so because they are so vague and very brief. At least give me a label I can identify with, if you must label me at all.
In the past I spent a couple days pondering the stackings listed at the link in first line of this post, and this was the one that fit me best:
"With this subtype, a lot of energy revolves around the issue of boundaries. Sexual/self-pres Fives tend to forge strong connections quickly and deeply, but if they feel betrayed, begin to feel overwhelmed, or if they feel that the connection doesn’t serve their true needs, can seem to cut the connection precipitously and “go cold.†They have high standards for significant others. They must feel that they can share their emotions with a significant other without being judged. This is their private world that they share. Relationships can be difficult, because individuals of this subtype will still want their own space and alone time, while at other times will want intense connection. Because the social instinct is least developed, this subtype is not very concerned with how others perceive them (except their intimates). This subtype is deceptive in that they may not seem to be especially intense – until they are engaged in a conversation they find interesting. Then the intensity and emotion become apparent. The internal struggle for this subtype is similar to that of the self-pres/sexual, but more energized and volatile, and getting to know this subtype means getting to know that.
When unhealthy, the energy of the sexual instinct can combine with the dominant type Five fixation to create a very impulsive Eight-like anger. The strength of their convictions can then come out quite forcefully."