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.