This thread takes the prize for among the Most Disgusting. Ugh, can hardly bear to think of foods I hate. Things like that are best put far out of mind, although need enough memory to never touch the stuff again.
Lots of awful looking stuff I know just enough about to not even think about let alone taste.
Having qualified that, the more traditional and civilized foods that I don't eat include:
liver
grits
hominy
beets
sweet potatoes
any raw meat or seafood