I'm impressed with all you ultra-runners, very impressed.
What made you want to tackle the long distances?
I started out with a goal of a half-marathon to get my lazy ass back in shape. Honestly, I didn't think I'd be able to do it. Then I did, and did another one, and another one. So, I got to thinking, "huh, I wonder if I can do a marathon." and it just snowballed. After my first marathon, I was like "well, I guess I better stop wondering if I can do shit and just get out there and do it." So, in essence, I have been taking on harder distances/ terrains just to see if I can.
A side benefit is that after years of struggling with stress and insomnia- I sleep all the way through the night 90% of the time.