The Big Picture - A bike should fit you. Most riders today are riding bikes that by our standards, are too small. They make you lean over too far, which puts too much weight on your hands, and too much.
The Top Tube Ruse - There is continuing widespread, rampant, epidemic, pandemic, titanic-like misunderstanding about the actual influence of a one or two or even-as-much-as three count 'em!
Toe Clip Overlap a.k.a. Toe Overlap a.k.a. "Toeverlap" - when your foot hits the front tire. Not as big a deal as you might think.