Oh god, okay, I just realized a thing: "how big is your outwards-facing stream of emotions" is a super important attractiveness quality. In fact, it's a "willing to even consider dating or having sex with" quality.
(Note: outward-facing does not necessarily mean positive emotions. Can also be negative.)
I know people who are fun to be around but who have zero of that—and it makes them not just neutral, but repulsive as partners for intimacy (not even necessarily sex). NOT NEUTRAL BUT REPULSIVE. God.
And I think my outward-facing emotion stream is low. Also in the same bucket: my sister told me once "you don't get angry at people, but silently decide to hang out with them less".
If this hypothesis is true—I'm low-key the worst. Huh.