I'd be curious to hear about your experiences in the Corps as an anti-authoritarian sort. I nearly joined the Marines myself out of college but decided that I was not well suited for it.
I'd like to think that I'm the latter overall, so, frankly, I didn't fit in, and I didn't do terribly well, but its mostly a non-story (with regards to anti-authoritarianism - in other ways I have plenty of stories). I was average, I mostly tolerated the authority because the threat of not doing so was a little more than I could bear, and I got the hell out as soon as I could. Then I was lucky enough to be a smart guy during the original dot-com bubble and found my way back into the company of people I was more comfortable with.