Carl,
Sometimes black and white just looks better to me, regardless of the film stock used to take the original picture.
Besides, my choice of film is largely dependent on what I get when I grab a fistful from the freezer. I have a mix of Sensia, Velvia, Provia, Ektachrome, RSX, and so on because it all came from my photobuds who gave it to me when they went Digital.
I don't pretend to be a film maven. for me 100 ISO is 100 ISO and if I don't like the way a particular shot looks, I can change the colour balance in Photoshop anyway.
Robert