All fruits are good for us, as they contain healthy nutrients. With diabetes, it is more a question of how any food affects your blood sugar. I love all kinds of fruit. Some, I find spike my sugar level more than others. So, when I eat these, I either limit the amount I eat (a half slice of watermelon is a full slice), or I mix them into a salad with other lower impact fruits, veggies, or protein (like a Chicken Waldorf Salad). I found a recipe online for a fruit salad that I love. It's strawberries, mandarine oranges (I use a can with no sugar added or packed in 100% fruit juice), pineapple chunks (same as the mandarines), 1 bananah, sliced, and the juice of one lime. The directions call for mixing the lime juice with honey, but diet sweeteners work as well. Toss the fruit with the juice. I like to add kiwi to this as well.
Another favorite is melon. By themselves, or mixed together. If the melon is not as sweet as you'd like, sprinkle some mint on it. The mint brings out the sweetness!
As you can see, there are lots of options!