I really like Provence for the beautiful villages, the food that is prepared with care and tradition (not unlike Italian food, but quite different), and the overall "feel" of being in a place in which beauty is part of the landscape. I've prepared a little introduction to Provence and the Luberon with a map to get started.
The real expert to this part of France is @PaulShawcross, who, besides writing for Bindu Trips like @italymartha and I, has been active in writing apps for travel in the region. You can check out Provence's Best if you wish.
Have you been to Provence? Any tips you'd like to share?
Have you been to Lacoste and the haunting ruins of a Chateau once belonging to the notorious Marquis de Sade and now owned by Pierre Cardin?