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.
The video mentions smaller hitbox, but a smaller character model also gives you more ability to see around your character from the 3rd person camera perspective. When I played World of Warcraft, I chose the man model of the largest race (for the racial bonus) and wore bulky plate mail body armor as part of my character class. I realized it was hard to see whether I was standing in fire or other ground effects. Watching other people play, I noticed that it was easier to see whether you are standing in bad stuff if you chose to play a woman human character, and much easier if you played as a gnome. I chose to start using consumables which made my character model visibly smaller.
I made a female bloodelf priest named "Juicyjuice" because I really wanted to see how much differently people would treat me and whoo boy, people were nice as hell. Honestly would do again.
Sippin on some mana