I'm in the same boat right now. I quit my job and am on a "learning" sabbatical right now myself. Some of the reasons you stated where mine too.. maybe some of the lessons I've learned so far may help: http://amirrajan.net/meta/2013/07/14/rebooting-life/
Interesting post (and fellow Crossfitter, too!). Kudos on building up that much of a savings runway, though I'm finding that some level of time pressure is helpful in driving me forward faster to find my passions.
Personally, I found it hard to focus on other things outside of a demanding job. And I loved my job, so it wasn't hard to get sucked in. I had a forced leave due to an accident, and that really helped with evaluating priorities. http://jennielees.net/departing-the-mother-ship/