1. Durian. Most durian varieties are good when just fallen or cut late enough with just the right ripeness - not crispy and not yet mushy. The best durian taste experience for me so far was a gaanyao fruit from our orchard - perfectly ripe, as it fell from from light touch when it was just about to be cut. If buying durians at the market, I prefer durian baan (basically random/unknown variety small durian with a strong smell) as the trees are usually very high and hard to climb, so people sell fallen ones instead of cutting the fruit down underripe as with the real commercial varieties. Also, small light fruit means small cost if the taste or texture is not as expected
2. Atemoya. We have a Phet Pakchong in the backyard, and this year it produced a huge amount of big fruits with excellent taste.
3. Strawberry. Grown in northern climate, bought from the marketplace and enjoyed in the park on a sunny summer day that's probably colder than the coldest day of the year here in the tropics
4. Mangosteen. Perfect taste, can be consumed in big amounts for many days in a row. Taste is the same (at least almost) no matter if picked from tree a bit unripe or collected as fallen fruit from under the tree, so there's no need to have your own tree to get good fruit, unlike with eg. durian.
5. Rambutan. Nice seasonal fruit, but gets boring faster than mangosteen. Haven't tried pulasan yet.