It's hard to compare savoury and sweet food, but alas
1. Turkish börek, especially with the spinach and cheese filling
2. Seasonal fruit, strawberries probably being the best in my area
3. Pineapple: can be brain-meltingly delicious, but preparing it is a pain
4. Hungarian pogácsa, these buns made with a hybrid yeasted and laminated dough and typically topped with cheese
5. Mango. Same issue as with pineapples.
Nuts are delicious, but they don't make it into the top 5 for me, and I won't count chocolates, brownies, cookies etc. as snacks.