Funny, I recently had a conversation about dill with my room mate, who is a French Culinary School-trained Chinese-Italian cook at Tabla. We both agreed that while dill can be tasty, it has very, very limited uses. I used to really dislike it, but I've grown to appreciate it, particularly on gravlax. I have a friend who uses in all her composed salads--she has other redeeming qualities. As for repulsive ingredients, how about dried shrimp? Oh, oh, and here's a really good example: assafoetida. It's an herb (spice?) used in southern India. Smells like sulphur, but does heavenly things to vegetables when you add it to hot oil first. Lobster mushrooms are pretty repulsive, when you know what they are--parasitized russula fungus: a type of mushroom, specific species often unknown, that has been covered in red mold. They taste delicious.