Are you the kind of person that keeps a tidy inbox? Or do you dog-ear pages of your books? Sometimes, these small differences can tell a lot about a person.

João Rocha, an art director for Young & Rubicam’s Lisbon office and brainchild behind the popular Tumblr King Jong-Il Looking at Things, has been illustrating things that divide people in two categories on his most recent Tumblr project, Two Kinds of People. There are the people who like order and follow the rules and then there are others who are a bit messier, and tend to think outside of the box.

The project began in March. Rocha told Quartz why all of the illustrations are “so minimal and simple. Truth to be told, that’s the best I can do.” Thus far, the project has accounted for many categories of people, including:

Those who keep files on their desktops, and those who don’t

Image courtesy of João Rocha

Those who name their files clearly and those who don’t

Image courtesy of João Rocha

Those who cut their toasts vertically, and those who do so diagonally

Image courtesy of João Rocha

Those who bother filling online forms correctly, and those who don’t

Image courtesy of João Rocha

Those who use bookmark, and those who dog-ear the pages

Image courtesy of João Rocha

Those who break off a chocolate bar in squares, and those who just bite it off

Image courtesy of João Rocha

Those who have no unread messages and those who have all the unread messages

Image courtesy of João Rocha

Those who set one alarm clock and those who set one every ten minutes

Image courtesy of João Rocha

Those who organize their books and those who don’t

Image courtesy of João Rocha

Those who organize their apps, and those who don’t