I came up with something the other day that I was quite proud of. I was thinking about my creative pursuits and how much they are a part of me. How much I enjoy doing work related to music, acting and such. Then it dawned on me: You know if you are in your perfect occupation if you enjoy working as much as you enjoy not working.
For example my job is great as far as jobs go, but I still prefer being home and goofing off, watching movies or doing any of the cornucopia of leisure activities I enjoy. However I do enjoy my creative pursuits just as much as I enjoy doing nothing. Even if I was infinitely wealthy I would still be pursuing the music, acting, writing, film making etc.
I figure maybe .0001% probably fall into this category. I wish you all luck in finding that job which you enjoy doing as much as you enjoy not doing.