My dad is a fishmonger, so it seems somewhat ridiculous that I can't stand strong fish, or even mildly fishy fish. I like tuna, I can tolerate salmon but Lord knows I've tried to like all else but I just can't hack it - It's mostly the smell but also the aftertaste of fish. That's my main gripe but I also draw the line at certain offal like heart and intenstine - If it pumps blood for a living, or transports poo, in my view, it shouldn't be eaten. Third and finally, celery - I don't know how celery has remained legal, it tastes like a science experiment to me.