What are the traits that will make u fall in love with a classical hero(eg darcy , rochester,etc)?

I don't know. In the BBC series Rochester made me fall for him but I don't think he was really cast right - he was supposed to be a bit rougher looking I think. Haven't seen Pride and Prejudice with Colin Firth but Mr Dacy didn't catch my attention much in the book, but then neither did Rochester in the book.