Lemons and limes. No matter how bad for my teeth they are, they taste delicious. Plus, I'll never get scurvy.
I mean what counts as fruits? Are berries fruits here, cus if so I have to say blueberries. I love being out on a run in the woods and stop to stuff my face with some nutritious blueberries. Then you come home and look yourself in the mirror and realize you're a smurf. I also love strawberries.
...All fruit? But not bananas. I can get tired of bananas. Or plums. Or mangoes. There were these amazing two weeks where I got some mangoes for the first time, and they smelled so good I ate them before they were ripe, and then I got some slightly nicer mangoes and waited for them to ripen and then by the time they were ripe the flavor was completely gross to me and induced my gag reflex. It was basically the most disappointing fruit-related experience of my life. I guess top 3 would be grapefruit, apples (Macintosh or Baldwin or Northern Spy or Macoun and probably a bunch of others straight from the tree in autumn), and yellow-fleshed peaches/nectarines.