Speaking of his style, I admire the way the Pope generally speaks off the cuff. Presumably he plans out basically what he is going to say, but chooses his words spontaneously. To the modern world this gives a great impression of authenticity and frankness, since we are still influenced by that reaction against the Victorian era that perceives formality as fake.
I don’t know if I would have the courage to do this myself if I were in his position, for fear of accidentally saying something I would later regret. Just look at what happened with a few things Pope Benedict said. But with Pope Francis there seems to be more good-will capital for him to spend (with those who would be most likely to criticize a Pope, that is), and perhaps confidence on his part that what he has to say is really worth saying.