Yeah: artist, electronics technician, entrepreneur, "consultant."
Most of these are pretty "iffy" (check out the average yearly income for an "artist"!); for a good career, you should go after a degree. The ability to build working Arduino projects will put you quite a bit beyond the CS or EE majors that did nothing beyond their classes and assignments. But the degree will put you far beyond the hobbyist in areas like physics, math, "theory", and other areas that employers think might be important someday. And they can be: you may never need to solve a symbolic differential equation, but I can't imagine doing much with PID control algorithms without having done calculus. Or that blank look some people get when you explain that graphics transformations can be done with matrix multiplies. For those entrepreneur and consultant careers, you ought to have some business classes (perhaps a LOT of business classes. Depressing, but true.)http://medriscoll.com/post/9117396231/the-guild-of-silicon-valley
There's also a "job security" issue: you may find a perfect job hacking arduinos and such, but if you lose that job, finding new opportunities without a degree may be difficult. I know people with 30+ years of experience who were laid off and now having troubles getting their resume past the 'first tier' of screeners at potential employers. :-(