Honestly, I think Michael Shannon would have been great in the Nucky role. I agree, Buscemi doesn't really seem to fit well, don't get me wrong, he's good, but there is something off when he tries to be really confident and strong. He plays a better devious/psycho character or a more comedic one. The parts where he is being funny, or snapping at people, are great--like whenever he interacts with his butler....but the guy has one setting for intimidation and that's that psychotic/sick look, like he had in the Sopranos, or Reservoir dogs or Con Air. He just doesn't do imposing very well withoutthat"I'm going to skin you alive" look--and where Nucky is suave, pin stripe gangster, he can't tap that.