It seems to me that general attraction or lack thereof is just natural fallout from combination of personality, behavior, experience, values, and other psyche elements, and many of the trends are going to hold true regardless of levels of health, since they're more amplifications than shifts. Even if I would take a healthy 4 over an unhealthy 9, there are still aspects of 4ness that are harder for me to deal with, and aspects of 9 that attract me, and as such I might still be drawn more to the 9. I also think the reason that people have tended to cite unhealthy behaviors is that even overall very healthy people will dip in health level from time to time, and those dips can really be dealbreakers in terms of ease of getting along. It's like what I said with 6s - I love
another 6 when they're sailing smoothly, since we can analyze and bond together. But when there's another 6 around who's clearly in the throes of a freakout, I generally try to leave the situation, because I'm aware of how badly that can impact me. It's hard to be drawn to someone when you know that sort of exchange is looming on the horizon.
In any case, being drawn to a certain type doesn't necessarily mean much in the long run. One of my best friends is a 3w4, two are probably 2w1s, another is probably a 7w8, another is confirmed 7w6. One of my favorite managers at work is probably an 8w9, another probably 9w8. My boyfriend is really
close between 9 and 1. One of my favorite online friends is a 5w6 and another is a 4w5. Those relationships are all across the board in terms of who I'm drawn to or not. Surface attraction is great to kick-start positive relationships, but I don't think it has a very strong correlation with significant longterm bonding.