I always make a male and female character and give them the same name from my other games if possible (I gave them personality/backstories in my head, dont ask). And sometimes I make multiple characters from different classes, species, races, skin colors etc. and if I feel creative, their back story/bio. Helps if one is a creative person that likes to write stories.
Why do men, women, and enbies play as bisexual poly dragonborn in videogames?
Because that's the option that allows the most playability/choices.