Just an FYI RE body types and me and your assumptions... I became obese simply by not moving and eating too much. I became skinny fat by doing endurance activities and eating too little. Everyone says I am an ecto now because I have lowish body fat and so it must be some gift I have for it.
I don't think that is true. I would call me a meso pretty squarely. My body works pretty "by the book". If I add 400 or more calories to my daily burn I gain .376lbs a week. If I take that manay calories away, I will realize the loss. No magic or weird stuff so far. I think that is the very definition of a meso right?
That said I am pretty Type A and as such will push myself beyond my body's general williness to work. I think that absolutely gives me an edge in this game but that is more mental than phisioloical. In fact the more I do this body recomp thing, the more I realize how important the mental aspect is.
Last night I went from work and a very challenging meeting to the gym. The news from the meeting had knocked the wind out of me. A result of this was that I simply did not have the strength or heart to push weights around like I know I need to. I could go through exercises and still lift somewhat heavy but that is all. To set PRs (get into a "zone")and to progress, I need to have my mind into the work and in a big way. Same with the running. On Sunday when I started my run there were about 3 or 4 excuses screaming at me. Everything seemed to be telling me to stop and give it up. On this day my mind was stronger and I pushed through and into the "zone" More times than not folks, I have to dig deep to exercise and workout hard.
So I believe the mind works together with or against the body and the more the mind can push through challenges, the better.... That is what type A people are good at. Pushing through...
There are a lot of circumstances in peoples' lives that prevent the mind from pushing through. I do not have a lot of these circumstances as a single person with relatively stress free home life. I live pretty much for me and can focus on me now. Big difference in how focused I can be. I think this is WAY more the cause of my results than my physicial body type. In fact I think that overall our mental "type" is more influencial in this game than anything.
But this is all me just talking out my ass. I don't have any sort of background or study on this... Just my own gut feel.