My favorite of the tropical fruits available in New Leaf would have to be the durians. They have the most exotic appearance. Bananas and coconuts are nice and all, but they only really look nice on the island and are pretty much an afterthought on the strips of beach in your town. The rest of the fruits listed are fine, I'm just sort of neutral on them in comparison.
Are we talking about these fruits irl or in game aesthetic lol. Lemons look amazing and also the fact that there's no yellow native fruit, it's a nice variation - also looks great next to Re-Tail. Durians just usually don't fit in towns I'm sorry, they're best left to the islands or island themed town.
Irl... Mangoes are great. I have awful gag reflex and I just can't stand the texture of Bananas unless they are chip versions, or served with desserts.