Assuming you like them (and if you think you don’t, then do persevere), it’s always handy to have at least some manzanillas and ideally a nice selection of Spanish olives. Many people prefer them stoned, but whole ones really do taste better and it’s part of the experience. Ideally you would have both in your cupboard, as you’ll need stoned ones for cooking and garnishing. You can add a sherry vinegar or olive oil marinade if you like and a few caperberries will enhance your dish.