After 2 years I couldn't wait to get back in there each week. I felt great, looked healthy, my skin cleared up, I wasn't depressed, was in the best shape of my life at the time. Playing video games (and later doing drugs) for 15 years didn't exactly pay off in those areas.

I look at it like this: Am I going to be alive in 2 years? Ok, then taking on a 2 year project is worth it. Months fly by in the blink of an eye these days, 2 years will have gone by before you notice.