I have so many crochet hooks that I use two cases to hold them all. The solid blue one was a gift from Kat & Fiona several years ago. I can’t remember how I kept track of my hooks before they gave me the case, but it worked so well that I found myself a second one to hold the overflow. And yes, I really do use all those different sizes.
I recently discovered the Tulip line of crochet hooks, which have a foam comfort grip. They are extremely helpful in reducing hand fatigue when working on large projects. I only own a couple of these hooks, but plan to acquire more in different sizes.