I can't eat eggs, no way, no how. Hated 'em since I was a little kid. The idea of them totally grosses me out. And they taste icky. Real mayo tastes too much like them to be edible either, though the very light kinds I can tolerate mostly.
I'm with you on the onions thing. They really need to be cooked, disguised and completely indistinguishable for me to eat them.
And I don't like any kind of alcoholic beverages. Wine and beer just make me feel hot and weird, and the taste has never grown on me. I have been able to have a rum and coke once upon a time, but even that anymore seems silly. I'm perfectly happy with the coke! Why ruin it with rotten stuff?