Public Enemies was so dull and worthless. In my opinion, Michael Mann is no better than Michael Bay; in fact, he's worse because he deludes himself into thinking that his films are somehow more intelligent and meaningful than Bay's. At least Michael "Explosion" Bay knows his films are nothing more than bang-bang action films.
I mean, come on Mann; there wasn't even any room for Depp to act around all those bullets flying. And the non-action scenes moved at the pace of a retarded turtle; no substance at all.