Ooh, ooh, ooh! Go for Magnus, it's top of my list. Nobody else in real life seems to like it, but anytime I see it (I'm working on a book that involves lots of Orcadian/Scandinavian history so I keep coming upon it) my heart goes ping! I don't know why I like it so much, but I can't get it out of my head.
Seamus I quite like and Atticus I really don't I'm afraid.