Mine love berries. They'd each of them kill the other five if there was a blueberry in it for them. Strawberries tops are a firm favourite. I don't bother with the rest of the strawberry, but when we're having strawberries we cut out the green bits and give them to the buns. When I've given them whole strawberries they've attacked the tops and then taken hours to get through the fruit. They like apple, but remember to remove the seeds first. Every other fruit has given fairly mixed results.
Chips will eat a grape, but he'll pull some very funny faces. The others just roll them around on the floor for a bit. Melon got eaten eventually. Only a couple of them will eat banana.
I tend not to give them very much fruit at all. Maybe once or twice a month. My lot prefer eating veg to be honest. But the good thing about berries is that they're small, so it's easy to dish them out in small amounts.