This is the politics of personality. An unfortunate human trate is finding some people attractive & others unattractive & judging them just on that. Nicola Sturgeon comes across as articulate & engaging. Ed Milliband by accident of birth has a slight facial deformity that affects his speech slightly. It makes him come across as slightly odd & weird, we might call it 'geeky' for want of a better word. None of this should affect the person. We live in a democracy anyway, no one person has all the power. Look at Obama, articulate, good looking, engaging, some people regarded him almost as a messiah, but the US president is not a dictator, in the end it matters not what he looks likes or how well he talks the talk, & so it is with UK politics.