We still eat laverbread [1], a gelatinous paste made from seaweed, in parts of Wales.
It was savoury, not sweet, great for breakfast with bacon etc.
I also really enjoy most seaweeds I've tried. Great food generally. I'll have to see if we can get something of laverbread locally.
I think one of the reasons for people not liking it is western diets tend not to like rubbery textures in food.