Oh my god Beth. Oh... my god. I've been playing Skyrim for over 600 hours and I just now heard a bandit humming that little ... thing. He was singing to himself while I stalked him from the corridor.
Just hilarious. I've never seen so much personality in a video game before. Some of the stupid comments that bandits and mercenaries say to themselves when they think they are alone is just hysterical.
Just for fun, do the thieves guild quests. At some point you have to break into a certain someone's house to find their plans for a certain thing. You'll know the time. There's a bandit upstairs, a nord, that's a former skooma addict. He has the most hilarious things to say if he doesn't know you are right behind him with a knife.