As much as I love printing MF and 4x5, there's a whole magical look to 35mm. I now shoot mostly 400 speed because anything smaller than 16x20 has a lovely texture to it that you don't see with larger film formats and not at all in the digital world (noise isn't so pretty). Some 35mm 100 shots can definitely go larger, but often times what I photograph with 35mm isn't worth going that large. It's not a format to go chasing Ansel with, but like anything, play up it's strengths and you'll forget it's weaknesses.