Quite the consensus. Thanks guys. It sounds like a thru-hike is the best idea. I have a tendency to focus on things, and I've been working to be more grateful and less materialistic, so it's spiritually better on that front too.
Roger and Paul–The wife does indeed enjoy hiking, but she's not much interested in a week and a half or more on the trail. I do like the idea of having her join me for a stretch, if we can work out the logistics. Fortunately, I should have the time since I teach high school and we have that nice summer break.
I plan on doing quite a bit of training in my backyard (Glacier and the Bob) this upcoming season, going off-trail frequently to work on navigation skills. The SHR is my first choice for the challenge and the smaller crowds.
Luke–if you want to join me for a big loop in the Bob or the Greater Yellowstone this upcoming summer, let me know. I hope to do a few of them.
Jay–your pictures are very persuasive.
Eugene–Thanks. It's my second Master's, and not a degree I wanted, but the-powers-that-be determined that I needed. Unfortunately for my program, the hiking is more of a reward than the learning itself.