There are some of the "broken" designs (like corner radius or capitalization) that amount to design choices and not necessarily constitute a good or bad design

There are some of the "broken" designs (like corner radius or capitalization) that amount to design choices and not necessarily constitute a good or bad design by themselves. Also, most of the examples seem to be taken from Skype. And why should we log in at the end, what do I get if I login?