I'm all for making an informed decision, but sometimes you just have to go on a whim based on an "I always wanted to take a class like that."

Case in point: Years ago, I was a technical bureaucrat and it was the first job where I had a little extra money. I took a jazz-singing class, primarily because it was close to the office and I liked jazz but didn't know how to play an instrument. I learned how to perform comfortably in front of an audience (if you can scat, you can certainly do a 30-min work presentation.) Best of all, I met my wife in the class.

Two years later I was married and giving presentations/teaching for a living. Not much more money, but much happier.