I just finished the Full Burst mission... That was a tear jerker. I've kinda liked Itachi for a while, but that fully established my opinion of him . That final scene with him and Sasuke almost brought tears to my eyes. And what's more, he understood the pain and suffering Kabuto was going through in their battle. Instead of killing him, he saved him from his darkness.
He really is an incredible character, easily one of Kishi's best.