The PMN in PMN Caecilia stands for Peter Matthias Noordzij. He designed this humanist face in 1990. Serifa used to be my favorite slab-serif face, but now Caecilia is for several reasons. First: it has beautiful character shapes that are less regular and geometric. Second: It has true italics and since I believe that italics are the perfect typographic choice for emphasis (because bold is too much), I prefer true italics to Serifa's Obliques. It also comes in many weights, numbered like Frutiger's faces, from 45 Light to 85 Heavy. Finally, it comes with true old-style figures and even small caps. The end result is a very modern typeface with a classical feeling. the slab serifs make it a wonderful face for faxing (and these days much of my own communications are electronic--either e-mail, where we currently have no choice of typefaces--sigh--or fax).