23 Things Only Type-A People Understand | Let's talk about to-do lists. There are two types of people in this world: type-A and type-B. And look, B’s, while we admire your carefree, relaxed and happy-go-lucky outlook on life, we prefer to-do-lists and structure. So go ahead and call us overly competitive, high-strung perfectionists, but we know how to get stuff done. Here, 24 things all type-A people can relate to.