I've actually earned a puny amount of money by doing what I loved before. I just wished I had read this blog post back then! I once had a website that I worked on for about 3 weeks. It barely had any content and I was lacking in every kind of skill that I needed, but I still managed to make over $2 from AdSense. Then I quit. I didn't quit because I wasn't making enough - I was actually impressed with what I earned. I don't know why I quit. Somebody took my domain name when it expired, too.
Another time I had come up with what I thought was a great way to cook hamburgers and went to a couple of people's houses and sold them at parties - hoping to eventually start a catering business of some sort. I quit that, too, after only two runs.
I could definitely earn a buck by playing guitar. I did decide to start a new website and actually follow through about a month ago, and it's already bigger and better than my old one. No ads yet. I want to be an inventor. That was random, but so am I.