Making up people is probably my favorite part of writing fiction. And when I say making up people, I don’t mean names and physical traits. I actually loathe those parts and will literally get stuck while writing a proposal for a new project because I don’t have a name for my MC. Then I’ll run out to Chipotle for some comfort food, look at the name tag of the first burrito engineer I see: Jim. That works for me. But Jim what? Jim Chicken? Jim Guacamole? Jim Steak? Jim Stakeman. Done.
And physical traits. If there’s nothing in the plot that might require a certain look or feature, then the creation process will go something like this: okay, I did red hair last time and blonde before that, so let’s go with brown. Done.