My favorite apple salad is the Waldorf, but I omit the celery. I'm not a celery fan, and with apples and walnuts, there's plenty of crunch. I also like a little curry powder in my Waldorf salad. That really amps up the flavor of the whole thing.
Of course, apples in a standard fruit salad are good too. A place near where I work serves fruit salad with a sweet-savory dressing on the side. I like that since I can control how much I put on my salad.