I've eaten assorted offal (heart, liver, kidney, brains, sweetbreads, tripe, tongue etc from assorted animals) and I actually like most of them except tongue. I've even eaten haggis, which includes the lungs - can't say I was all that impressed. I don't much like Black Pudding, which is a sort of sausage made from blood, but I'll eat it to be polite.
I've eaten quail and pheasant and frog's legs and escargot.
I've eaten kangaroo (tastes and smells like rancid boiled mutton); emu (like a heavy-flavoured steak which sticks to your stomach for days!); and echidna (very ant-y) and galah (the recipe for cooking it is to put a large stone in a pot of water with the bird and simmer until the stone is tender, at which time the bird will be edible).
I've also eaten emu eggs - as an omelette equivalent to 12 eggs. Very rich and delicious.
I've eaten buffalo and wild pig and crocodile and wild duck.
I am rather partial to octopus, but prefer the baby ones. I'm not keen on crab, but like yabbies.
BUT - I draw the line at eating snakes or rabbits, or eels or sheeps' eyes! (I saw Princess Diana do this once, without so much as a flinch, and I was her slave for ever more in admiration!) Nor will I ever knowingly eat things like monkey's brains, bear's testicles (or any other kind of testicles). And I'm quite sure I couldn't choke down guinea pig, rats, beetles or cockroaches, chocolate-coated or not.
Thailand is the place to avoid if you have a weak stomach. They eat anything that walks, crawls, slithers, flies or swims.