A cartoonist or an astronaut

From Bill Watterson's introduction to The Complete Calvin and Hobbes:

I’ve loved comic strips as long as I can remember. As a kid, I knew I wanted to be either a cartoonist or an astronaut. The latter was never much of a possibility, as I don’t even like riding in elevators. I kept my options open until seventh grade, but when I stopped understanding math and science, my choice was made. There is great personal satisfaction in attending to detail and quality, and I remain very proud of the standards the strip met day after day. I also liked the responsibility of knowing that, succeed or fail, it was all my own doing. This approach kept the strip very honest and personal--everything having to do with Calvin and Hobbes expressed my own ideas, my own values, my own way. I wrote every word, drew every line, and painted every color. It’s a rare gift to find such fulfilling work and I tried to show my appreciation by giving the strip everything I had to offer.