Thing that always got me was how Khan knew so much about the Klingons in Wrath! If he'd met them at any time why didn't he ask them to transport him off that hell hole? And if he'd been listening to their top ten hits as they passed by why not ask them top pick his people up? It's just that he seemed to know so much about their sayings and such for a marooned superman!
JB
In my head canon Khan had a book with Klingon proverbs on Ceti Alpha V