How do you guys come up with pronouns?

Title kinda says it all :p

For context I’m creating around 20 languages through time in 3 different family trees for my world building project going on 2 years now.

I can come up with interesting grammar and vocabulary on my own, using multiple different languages, language families, and cultures as inspiration from real life, I just can’t make a set of pronouns that I like across the board for the life of me

And please don’t tell me just to “focus on one language at a time.” Obviously I’m not working on all 20 at once.