I only eat mayo on sandwiches if it's dry turkey or chicken. I love some aioli (spiced mayo) Especially chipotle aioli. A Tapas restaurant near me makes these Peruvian chicken skewers with an aioli that are stupidly good.
My favorite root beer is Mugs, A&W always tasted slightly off to me. I love most cheeses.
I like ice cream, but seldom eat it.
As for salad dressings, I eat one of three or none at all really. Thousand Island is my favorite (as some call it, white trash ior trailer park dressing hah) Then Ranch (though sometimes I will skip it all together if this is my choice) and then sometimes I will do a caesar salad.