From the 8 Faces blog:
Over four years and across eight issues we interviewed 64 world-renowned designers1, including; Erik Spiekermann, Jessica Hische, Michael Bierut, Nina Stössinger, Mark Simonson & Seb Lester, plus owners of respected type foundries such as, Font Smith, Type Together and Process Type.
We’ve counted the number of times each typeface was selected and found consensus with the top 25. The top 10 designers’ favourite fonts will be quite familiar to many but hopefully the full list will provide a useful stepping stone to exploring many more.