I also appreciate that you have chosen to publish your writing more in a blog format just like on http://weblog.raganwald.com instead of the GitHub experiment, I never really got into reading your stuff there.
As for the question posed, I believe I'm biased towards invention. I would prefer to work in a research department in a company or in a small company that have a business idea (partly) based on research. I hope I'm wise enough to avoid NIH, that is not really inventing anyway, so it's not as much fun as real inventing. (Working in a university seems to come with too much bureaucracy for my taste, but I do like the teaching part.)