Din is a rather... unusual Redguard encountered north of Gnisis. He apparently lost his mind when he was bitten by a slaughterfish, and his fever is making him say very interesting things, like: "Muddled? Where? No! Don't play in the muddled. You'll get a dirty mind."
When wandering the countryside, you might run into a naked Nordic barbarian standing around. He claims a witch stole his clothes. Elsewhere, you might encounter another Nordic barbarian claiming a witch stole his clothes. And a third. There's also one in Tribunal, but he insists that he was only naked because of the heat, and complains that everybody thinks a witch stole his clothes.
Dagoth Ur's reaction when you start attacking the Heart of Lorkhan.
The "Favors for Orcs" quest. It involves two orcs trying to hide from the guards for whatever reason, and you must play messenger boy between them. The first gives you a note to give to the other orc, saying that he's hiding "by the tree near a rock and another rock". He says that he's "good at hiding, so if you don't see me, that's where I am". When the quest is over, your journal notes that you "feel a bit stupider for ever having talked to either one of them".