obsessive
You have a spot for every stupid thing and every stupid thing is in its spot. It's like your brain is a messy room and you're the cleaning lady who never stops.
My sock drawer has three sections: white, black, and 'the one sock I lost in 2017.'
She color-codes her snacks. Every single one.
He has a separate jar for every type of nut. Even the ones he doesn't eat.