I like simple sandwiches, for lunch I usually get chicken or ham with cheese, tomato, lettuce and mayonaisse with a bit of salt and pepper. If it's a bit more posh then smoked salmon and cream cheese is good.
After Christmas though all you eat in sandwiches is turkey and ham. I can't imagine how you Americans do it with Thanksgiving in the month before Christmas, do you just eat leftover meat sandwiches for like two months?