If we take this as a question about how to interact with people in a cafe environment and not a banal question about the best kind of coffee then just order what you want. I once had a meeting with a boss who ordered a milkshake while wearing a suit.
coffee?
so many choices.
I always solve that problem by ordering hot chocolate.
There's usually just one of those, compared to a dozen different latte flavors. Plus, I don't even like coffee.