Can't leave this topic without mentioning Madeira. Sercial is a magnificent very dry madeira, rather like a very, very, dry sherry. Nobody drinks dry sherry in England, so that may not help you much, it occurs to me. People think sherry is Bristol Cream !
Anyway, try it; it will be completely unlike any fortified wine you have ever tried. The one to avoid if you think of port or 'normal' sherry, is Malvaisa, what we call Malmsey. This is very rich madeira. I used to buy a bottle of Malmsey, of the brand called Duke of Clarence (because the Duke was drowned in a barrel of Malmsey) every Christmas. That is really what it is for; digesting after a heavy meal, as port would be.