My favorite is to open the refrigerator and find a cold left over roast meat (beef, pork, lamb, chicken) and to slice a piece off of it, and still standing sprinkle some salt on it and eat it there at the counter. It's one of the most satisfying things to have for me. Next down the line is a piece of cheese. I actually particularly love american cheese sliced at the counter - a luxury i can't ever get here - good as italian cheeses are, i do love this large slice of american cheese on my tongue. But here i'll take a piece of parmigiano or a cheese called "camoscio d'oro" (a less intense brie) and just slice and eat, as is or with some saltines, or alternating with slices of pear. Or some sliced Leerdammer which they do have in supermarkets.
I used to prefer sweet snacks, now i'm drawn to salty protein.
I also like buttered zweibacks dipped in tea with milk (good, dark black tea with plenty of milk and some sugar) or a slice of american type bread toasted and buttered and also dipped.
In the states, a thomas english muffin buttered and with strawberry jam.
Since i bring my "lunch" to work and eat it in ten minute intervals between appointments, it's all really just a series of snacks, so when i can i have cut up pineapple,or cut up watermelon, pieces of cheese with crackers or pear, a pot of cottage cheese with salt and pepper and raisins and sunflower seeds in it, a slice of soft american style bread spread with peanut butter and a bit of honey, folded over, a container of tomatoes, salt pepper oil and a piece of nice artisan bread to dunk in the juice, a piece of leftover roast when i have it)..
Of course, i love potato chips. i try not to buy them.
Many black teas with sugar and plenty of milk. I only like unbroken orange pekoe (ceylon) tea, since i can let it steep longer and it gets strong without the tannic feel to it.