Greg: Is this where we have to call HR to escort you out of the building? ;)
I hear you. Marathon training is putting a lot of eggs in one basket. I kind of like the singular focus, the freedom to NOT do speedwork which occupied a great deal of my HS and college life. I do find myself thinking "all for one day in october" when I'm grinding out another 10miler in the heat (as if I was running in my own movie trailer). But I actually LIKE the marathon workouts. I like the challenge, the slow-burn of a long tempo run. It clears my head and lets me focus on one thing for a while every day.
Crap, I have to get up in 4hrs and get to the airport.