Among the small and very old ports (a Roman one) on Sardinia, we have to talk about Porto Rotondo. Google images for it, it is worth it by its aerial views.
It is very difficult to find a place there in summer (they are also expensive) and mostly they are occupied with big yachts but these are old rich, not "new rich" that dont need to show that they are rich, at least not by their houses (well, the boats are big
). I mean they have not changed the low profile house style even if any of those houses worth a fortune.