Playing the "Heel" makes me love Sherm even more. This IS entertainment, and he makes it interesting and fun to watch.
The downside, for Sherman at this point, is that he wasn't super fast, to begin with, and will never be at the playing speed he was before his Achilles injury. Yes he's a technician and he's one of the greatest CB's of all time (IMO), but he'll never regain the playing speed he had. This puts him at a severe advantage and with his physical style of play, may find himself grabbing and holding more often.
What I'm trying to say is, I don't think we'll see the Sherman we're used to, when we face him twice a year. But, the drama will be there, he will make sure of that...which is fantastic.