Aviators are the classic tear drop shape that I'm sure we have all seen. Navigators are a rectangular version of the aviator style. So in most cases you still have the double bridge and "military feel" that you find in aviators.
Love this thread, I wonder if its possible to make a top 10 list. There are probably too many awesome entires to look through and even harder to pick just 10.
Not to derail this thread but what are these shoes