I eat Haggis and Black (a.ka. Blood) Pudding every time we go to the UK. I actually like both and would rather eat them than American Scrapple or Head Cheese, Braunschweiger or Goose Liver pate. I'm not otherwise fond of organ meats -- particularly the Mexican soup called Menudo -- cow stomach tripe in broth.
I've had Potted Rabbit, too, which appears in those Victorian novels, and is just a nice patè -- like Deviled Ham but not spicy -- and goes great on crackers. Very tasty.
The one thing I've eaten that I'll never touch again unless protocol and international relationships are at stake is Monkey Brains. I was served this delicacy at a Vietnamese party; a homecoming for my housemaid's husband. Doesn't taste like much except spicy chiles, but has a weird texture... Blah!
updated by @ken-hulme: 07/24/19 08:15:27AM