It would be informative to perform a multiple regression analysis of the demographics of individuals who submit anecdotes to microaggression websites of how they have been victimized:
I’m not going to do it, but, as Yogi Berra said, you can observe a lot just by watching. From reading over examples, I would guess that common factors would seem to be:
Female (or "'female'" or "female-identified" or "female-bodied")
Homosexual
The more recondite the self-described orientation, the better: e.g., a "genderqueer" is more likely to complain about being victimized by microaggressions that is a "lesbian."
Nonwhite
Mixed race
Visually ambiguous race
Belong to an ethnicity with a high degree of immigration
But, born in the USA
Student
Employed in the (nominally) helping professions, but not the real helping professions, such as nursing (see below for nurses' and doctors' attitudes)
AAA (or Triple A): Ay Ay Ay. Precursor to Status Hispanicus. Wound-up Hispanic female unable to tolerate even the small discomfort of removing an adhesive plaster, but not yet full-blown histrionics.
Acute Pneumoencephalopathy — airhead
APRS — Acute Puerto Rican syndrome (bouts of screaming and yelling)
Blade — Surgeon: dashing, bold, arrogant and often wrong, but never in doubt