What makes the “subjective feeling of identity” different from just having a different personality? Or what makes it different from a subculture like the ones o

What makes the “subjective feeling of identity” different from just having a different personality? Or what makes it different from a subculture like the ones of the past - punk, goth, emo, and so on. I think of gender as being strongly related to sex (like a trait of belonging to a certain sex), although I recognize there is an ongoing debate around how to define this word (gender). And I view personality as more personal, variable, and subjective. Is it that personality implies individuality whereas the subjective feeling of identity for trans people comes with group belonging?