My theory is that if you look confident you can pull off anything - even if you have no clue what you're doing.
I've always seen myself in sentences. I begin to recognize myself, word by word, as I work through a sentence.
What I find really attractive is something that's going to be a little dangerous. Something that might get me into trouble; you know, you turn up in London and you've just rewritten Dickens. And, of course, then you think, 'What have I done?'