The French Riviera and in particular Nice, Cannes and those areas are always good to visit, but I want to recommend the town of Valbonne. I had a really nice stay there a while ago and resided in a villa nearby that had its own pool and tennis court. Nearby is Grasse for perfume and shopping, Mougins and of course Cannes and long sandy beaches. I can certainly recommend this area.
Easy to fly into Nice, a number of airports and airlines do it. I flew Easyjet from Luton and stayed in a villa from www.qualityvillas.com