My favorite One Direction song would have to be either 'Truly Madly Deeply' or 'I Would'. 'Truly Madly Deeply' has such beautiful lyrics and I think it showcases all of their voices really well. "...might not mean that much to you but to me it's everything..." It's just one of those songs that I can listen to all the time and always feel the emotion. 'I Would' is also a fantastic song and it's written by another band that I really love: McFly. I think 'I Would' is a great song for the fans because it kind of gives the flip side of the relationship; sort of being on the outs and telling the person you like that you would be there for them. One Direction have really matured in their sophomore album and I'm so proud of them!