I am a big fan of the For Faerie, Queen & Country setting -- for those of you who aren't familiar with it, it was a Victorian supernatural setting, with an emphasis on the fey folk. There were thaumaturgical societies, royal magicians, Holmesian detectives -- it was notably short on physical violence and long on atmosphere. IIRC, it used a grammar-based magic system, where you constructed spells like sentences, where the subject, verb, and object determined the subject, scale, and effect of the spell. Good stuff!