I can certainly see Taylor’s point, and I think it comes down to what kind of work you do, and for whom. If you have a “retail” design consultancy, with people coming in off the street (inventors, startups, etc.), then you’d have to be pretty crazy to roll the dice and take a royalty on all of them. I have a much different situation in that I only do stuff for a couple companies. It’s very rare for me to hourly bill anything.