So, I finished my fast a couple days ago and I think it was a great learning experience! I did a parkour training session near the end and definitely was surprised at how my body was acting / I was reacting. Definitely was surprising just how often I think about eating.
I notice there is one person in this thread who is shooting down this idea of fasting for self improvement as "pointless" and basing all of his arguements around this assumed fact. I see no actual evidence presented to back this up besides the stating of it being "pointless" and a few subjective points. I see nothing pointless about raising awareness about hunger. However, one thing I have found pointless several times is sitting around and arguing on the internet

(so I won't be sticking around to argue, rather, I'll be off training or doing other stuff to better my life

).
Actually fasting has a few health benefits if done properly(it has actually been
prescribed for some health conditions

) . I learned this as I was fasting, I was wondering why I felt so "good" so I did some research.
Gentlemen I give you SCIENCE:
http://serendip.brynmawr.edu/exchange/node/1834 (a well cited scientific article)
Brief summary of a couple points in the article:
(Paragraph 3) As you're running out of energy reserves your body seeks out as many alternative sources as it can before it turns to cannibalizing its own protein for energy and entering a state of "starvation" (organs, muscles, etc.).
(Paragraph 4) Your body detoxes itself because a lot of toxins consumed (e.g. DDT) are stored in fat reserves. Thus, they are released when these stores are used.
(Paragraph 5) Healing becomes more efficient as energy is diverted from digesting. Also, abnormal growths (tumors) get less support so are more susceptible to autolysis. Your immune system becomes more efficient with more energy available (I also read on a separate source (be wary, un-cited) that the body seeks out and catabolizes bacteria, viruses, and abnormal cells for energy.)
Sooo, not only is this good mental exercise in overcoming your own urges and enabling yourself to overcome obstacles, but ALSO it's good for your physical health (if you do it right i.e. following the tips on the website, talking to your doctor first).