I adore liver. When I'm poorly its usually calves liver I crave. But I love every tye of liver I've tried, pan fried or pate or whatever, I love it. I've had sweetbreads a couple of times and they were ok, I'd eat them again but I've not gone out of my way to have them. Kidneys are fine, a steak and kidney pie is always a winner! Hearty is what my pets get...so I've never tried it, but I would I guess. The other stuff does not appeal, but I'd try it out of curiosity given the oppertunity.
ETA just remembered I tried tongue for the first time two years ago and HATED it. But at least I tried it!
In omnibus amor et iustum