When I encounter a GM who has like pages of lore, I'm always like "Would you rather write a book?"

Stuff like this can be very good, but be aware there are some players who hate this. Some people just want to be told a story, and if you ask them to be too creative they'll have a bad time. Sometimes it's because they're new and nervous, but sometimes that's just how they are.

Also some players just routinely have difficult ideas that don't mesh with the group. Like everyone else is vibing on a serious dark modern day vampire political game, and they're like "I want to be a ninja turtle from Mars with a reanimated dead fish for a head". Like, what. Maybe some people enjoy "zany" off-theme stuff. Not me.

Or the player that always wants to be themselves. Or an amnesiac.

Gosh I've had so many players I didn't enjoy.

Anyway. Player input is also built nicely into Fate, both in campaign creation and scenes. I'm a fan. Spend a fate point and declare a story detail like "every Razer Space Technology office has a helipad with a chopper ready to go. It's because the CEO is weirdly hands on and loves helicopters."