In addition to the hybrid-workflow processes mentioned by jslabovitz, I don't like the short lifetime of colour print film. I'm mainly a b&w shooter, and I've gotten used to the idea that both prints and negatives should be hanging around in good condition for a hundred years or so if properly cared for. I'm not sure what the realistic lifetime of E-6 materials is in practice, but it's got to be longer than C-41.

Also, medium-format transparencies just look delicious.