I complain about system fonts, but I won’t say a bad word about Gill Sans—it’s overexposed, but its unconventional details give it an enduring charm. Gill Sans lit the way for other sans serif fonts that combine geometric precision with looser hand-drawn features, like Ideal Sans, Brandon Text, and Verlag, which together prove that being geometric doesn’t mean being dull. (My own geometric sans serif, Concourse, also takes some cues from Gill Sans.)