Hard to pick just 5. I kept thinking "hey yeah, I hate that too!"
Still, I'd like to add cilantro.
I left mushrooms off because for me it's a question of texture, not really taste. Since it was tastes you hate, I went for the stuff that makes me actually want to barf if I eat it. Some of the stuff I can't even stand to smell: coconut, green peppers.
I'm going to tell Pete right now that I hate pork (I dont' really) so he can persuade me with his BBQ ribs, though!