This is fun, without being mean spirited.
I'll eat almost anything (except sweets - medical problem there.) I make it a point whenever we're traveling to try the local specialty, and to try something new every trip. I must say I didn't like andouillette, although the mustard sauce with which it was served was sublime. I asked for extra sauce. Twice.
I have had brains twice, both times in Poland, and neither time were they presented looking like brains. Once they were poached, cubed, and served in a rich cream sauce; the other time they were ground and used a filling in something like a sausage roll.
I'm not crazy about blood sausages (or blood soup) either. It's the texture there, I think. I did have a meat pie in London some years ago that included blood sausage in the filling, and the sausage melted into the sauce, enriching it. It was delicious.
My DH, a recovering picky eater, was stunned to discover he likes snails and squid. He now looks for them on the menu wherever we are. His worst food experience was on a train in Poland. We shared a compartment with an older man from a rural area. He pulled out his lunch, and insisted on sharing it. I declined politely, but my poor DH thought that was rude. So he took some. It was sheets of lard layered with various herbs and seasonings, then rolled up and sliced. It took a lot of swigs from our companion's vodka bottle to get that down!
I do find there are some things that my body will not tolerate: goat, for one. I love the taste, but after three times being indisposed the next day, I realized it's off my menu forever. I also had an unfortunate reaction to horse meat a couple of years ago, and haven't had a chance to try it again. I don't know if it was tainted, or just something my body doesn't deal with. Very fatty things are a problem sometimes; that's why I declined the offer of the lard on the train.
Tripe? I'll eat it, but seldom search it out. Although New Mexico menudo is worth the trip.
I finally tried eel last year at a fish stand in Amsterdam, and it was wonderful. I haven't had a chance to try haggis yet, but I certainly will try it should we ever be in Scotland.