Apart from Chelsea I can't think of any other club that gets anywhere near the criticism Arsenal do.
Every year Arsenal are told they won't get top 4 etc and they do, all this despite the superior financial muscle of ourselves, United, Liverpool and now City. When Henry left said everybody thought they wouldn't even get top 6, the only thing that has ever held Arsenal back is their defence which has always been their achilles heal. Wenger inherited a great defence when he came to Arsenal and they haven't been the same since those players left. Despite all the calls to change style etc Wenger and the team have stuck to their guns. The biggest examples of Arsenal's mental strength for me was their result against Barcelona last season