Olives, especially stuffed ones, Garlic, Anchovy, Jalapeno, Feta Cheese all great in equal measure.
Anchovies.
Pineapple on Pizza, lob some olives and anchovies on and i'm in pizza wonderland.
Squid/Calamari I love it wife hates it. The same with liver and olives for us. I would think that sheeps heart and lamb kidneys would come into this category as well. as she loves them and I dont.