I found these little fresh mozzarella balls, and they worked perfectly for this recipe. The balsamic vinaigrette was real tasty, and this is a beautiful and colorful appetizer. Mozzarella has little flavor on it's own, and the vinaigrette and basil add needed flavor. Next time, I'll let it rest longer than 2 hours and turn the skewers regularly in order to absorb even more of the vinaigrette flavor. Thanks for posting this great idea.
I personally prefer this salad without vinaigrette. The basil is so strong that it really doesn't need it! I just use salt flakes. Buffalo mozzarella is my current obsession. I wasn't sure if I'd like it because it sounds a bit weird, but it's so yum.