Vilmosz, I concur with the others. What a great post! I feel I am amongst kindred souls here. I also have binders of mind maps and have read everything by Tony Buzan. I even bought children's books on how to draw to help me with the diagrams for the mmaps (whole brain thinking n'est ce pas?). And it worked. I can reasonably draw now too. It makes mundane projects and reports fun to do and remember. Ok, out of closet too.
And I also have a corporate career where I occasionally, but serruptitiously, do some right brain thinking. Sacrilege (did win some awards though).
I originally bought David's GTD book because it contained mind maps. I think David's philosophies and processes span both sides of the brain and are accessible to all of us. Saved my life to be sure.
If you are drawn to writing, perhaps a modern day success story is the fellow (don't have his name right now) who wrote his first novel, "The Notebook", while working in a pharmaceutical corporation. He was offered one million dollars for the movie rights and the rest is history. He's a writer now, with a good paycheck to boot.
Good book recommendation - "The Renaissance Soul" (Life Design for People with Too Many Passions to Pick Just One) by Margaret Lobenstine)
for the multi-gifted person (based on post - such as yourself)