I've reached a conclusion about watercolor: it's a feline medium. It's fun, affectionate, and playful. But it has a mind of its own. It will go from purring to claws-out snarling in a second, and then back to happy. It will stubbornly refuse to do what you want, and then do it without asking. And it leaves hair everywhere (paint stains).
Ink, on the other hand, is a predictable, lovable dog. It will obediently do exactly what you ask. It will occasionally have accidents, but they can generally be cleaned up with ease.
All that being said, I managed to convince the feline medium to give me a portrait of Janis Joplin. We're going to see the traveling Broadway show (A Night with Janis) Thursday night. I'm thinking about throwing the pic in the car and offering it for sale as the crowd exits. If it's a pleasant evening, weather-wise, I just might.