Three words: Ooh la la!
I LOVE Isaacs! I think they couldn't have found anyone better to play Lucius- he was almost exactly how I imagined him in the book! I was SO excited to see him! I loved him to death! I've got a picture of Lucius on my viola case, which I carry to every class with me.
Dude, look at those eyes! He looks positively crackers! Who else could pull that off? Nobody! That man's a genius!

On another note: Go see Alan Rickman's new movie, "Love Is!" I'm an Alan Rickmaniac!