I can commit myself to anything, I have a very strong will power. I was the weakest and slowest person on my football team but I stayed on even after a ton of my friends quit, the only reason I quit was because I wanted to start my own excersize routine and diet instead of following the football one. I have low expectations for everything, I always assume the worst whilst hoping for the best, and I find this works. When training a 0.1 inch gain excites me, cutting 0.1 seconds off my running time excites me. I give it my 110% everytime and expect nothing out of it, and therefor I am always happy with my results. Some people expect things, and I can understand that, but these people won't get anywheres in life. They can go on expecting to win the lottery, expecting to land a dream job, or expecting to have the perfect body in one workout. I will go on hoping for these things, but never will I expect them to actually happen.
A wise man once said "Expect nothing, hope for everything." I think alot of people out there would gain alot if they followed it.