eggs - I love them, but the smell is gross. DH always makes his breakfast each AM while I am in the shower. SO I get out and the house always reeks of scrambled eggs. I gag.
most meat (bacon is really the only one I can tolerate - while cooking....the smell that lingers AFTER cooking, though....makes me queasy). Ground buffalo - which is what my family eats - is so nasty smelling...I have to plug my nose while cooking, or leave the house and have DH cook it. Blech.