My Top 3Peaches in the summertime, number one . . . but they need to be local or at least regional, so they're tree-ripened, and not some hard, dried out, picked too early, tasteless thing from across the country.
Rainier cherries, number two, but they're outrageously expensive around here (DC), usually, so they fall into the guilty pleasure category, too.
Ripe pineapple, number three. Took a family trip to Hawaii about 30 years ago, and fresh ripe pineapple every morning was definitely one of the highlights of the trip.