I tried Gjetost once; I remember it had the tawny colour and the grainy texture of fudge, it tasted of bacon and it made me violently ill. I heard later on that it's made from whey, leading to quite fierce disagreements among cheese cognoscenti about whether it's a cheese in any sense of the word (with Gjetost fans on one side of the argument and everyone else on the other).

Just thought I'd mention it.