Men: don't wear the untucked shirttail. It cuts you in half, which is a very bad proportion. Think of yourself as a series of thirds. So when the shirt is tucked in, you're 1/3 on top, 2/3 on the bottom.
Tim GunnSuccess needs to be measured according to the ambitions and the resources of each designer. And many aren't interested in being a megabrand.
Tim Gunn