I certainly admire the work and patience of those who work with macro photography. I know that I am not patient enough to do this. I walk around with my 100L and 7D and thats about it. I do find that I prefer the longer reach of the 7D to my 5D MK II with the macro lens. I guess that tells me i would like a 180mm L IS for my 5D MK II if it ever comes out.
My first try at a Macro photo was with my Canon FT QL in 1968 using extension rings. Lighting the subject was difficult, and I gave up the effort pretty quickly. I built a darkroom in a corner of my garage and developed film and dabbled in B&W and even color prints. Then, my first child came along along and with a move to a larger house, I never took up my own developing again until digital developing became possible.