Menacing - Good question. I should say, I'm about to try Pyrocat HD for the first time (as soon as I use up the last of my Rollo) and EXPECT to switch. This is mainly because of the positive feedback I've heard from a few people who's opinions I trust. People who have used PMK and Rollo and see a benefit to Pyrocat, particularly for the alternative processes, which is what I'm into. If you want more info on how I use Rollo, feel free to PM me.
Carl - well, if we can keep her out of the stores in Glasgow long enough to stand still for a portrait, we may have a model!