I'm not a big sandwich eater, but when I when I bring home a loaf of bread from one of my "food swaps", I'll go on a sandwich binge for a few days. Part of the loaf goes for cinnamon toast and honey toast. Sandwich-wise, I'll go for....
...peanut butter, banana, cherry jelly. That's my dream, but in reality it becomes macnut butter, banana, and whatever jelly I happen to have. This is a real comfort food for me.
...pickles, tomatoes, and mayonnaise. Yum. I'll have this one for dinner.
...cream cheese and green olives. I haven't had this one in years simply because I seldom have the ingredients in the house. But I sure do love the combination.
...gravy sandwiches. Homemade gravy over fresh bread, wonderful comfort food. Yeah, I'm a cheap date!
...watercress, tomatoes, mayonnaise.
...thick slab of tomato with mayonnaise. Simple and heavenly.
I don't have an ultimate favorite. Since I tend to eat what we produce, forage, hunt, or trade for, I'm pretty happy with any of them. They are all a special treat.