I also, of course, have a heroic Nord warrior (who strangely is a werewolf), and a pacifist Breton mage ... not completely pacifist though, because I will still rely on followers to fight my enemies. I have plans to start an evil-aligned straight mage character, probably Altmer.
No matter what type of character I choose to play, I always end up sneaking into battle. I rarely find myself charging into an unfamiliar dungeon ready to attack whatever comes at me. I'd much rather know what the full situation is before I choose a plan of attack. Therefore, I probably use Aura Whisper more than any other shout, for all of my characters.