neuroplasticity

Interesting, though I recall having a conversation with some dude at a flotation tank place who said your dominant hand affect the OPPOSITE hemisphere of the brain (so, a right-handed person becomes left-brained).

I didn't immediately buy into that, though it is certainly true that, as a right-hander, I am also definitely a very left-brained person a lot of the time.

I don't fully buy into the idea that being right-handed makes you left-brained, though I honestly haven't researched it enough.

There might be a correlation there, but not causation.

I would say the primary (not the only) indicator of whether or not you become left or right-brained is cultural programming. The influence of cultural beliefs, along with 13 years in public./private modern schools, can have a HUGE steering effect on the development of the brain. Sitting in class, being forced by parents, teachers, or blackmail bribery ("get good grades, and I'll buy you that toy") can mold a child's mind into constantly using the left-brain, which is primarily what modern schools enforce.

With the new "Common Core" initiative that seeks to basically eradicate all remaining right-brained school subjects (art, dance, physical education, etc.), it is clear that schools are prison-factories DESIGNED to mold the minds of children towards left-brained logicism, analysis, and pattern-seeking (as opposed to the right-brain's tendency towards feeling, the physical body, intuition, etc.).

But you are certainly right: the mind IS very malleable, and you can just about become seemingly almost anything with enough effort. A LOT of effort, certainly, and the work of Tim Ferris in his book "The Four-Hour Body" is certainly an example of the malleability and potential of the human mind/body. Tim Ferris has basically mastered multiple different skills from COMPLETELY different paradigms, ranging from Spanish dancing, to learning new languages in VERY short amounts of time, and many, many other talents...