When I was in graduate school, I took a type design elective taught by the excellent
Cyrus Highsmith. The first week we each gathered and refined the basic formal elements that would define the nature of our typeface. In my case, I wanted a display face optimized for the screen — with rounded slab serifs, a roomy x-height for readability, and bowls with a distinctive tear shape to them. What emerged was Shoestring, a "simple, friendly, open type face for blogs. Suitable for boilerplates and headlines. Optimized for use on screen."