My tuppence worth.
Caroline reminds me so much of Princess Margaret of England.
Beautiful and privileged, they were highly intelligent and thus bored with their tinsel-strewn but empty lives. Had they been born into a different lifestyle they might have been happier but they were intelligent yet underutilised and this made them depressed, a sign they both exhibited through grandiosity and hauteur.
For a young woman, Caroline seems remarkably jaded in the Walters interview.
Caroline only looked happy during her family years with Stefano. Those were her "years" so to speak- looked great and had a vibrant smile.
Ultimately both she and Margaret were beautiful second fiddles with a gilded material life which was never quite matched by their personal, emotional life. Maria Callas too was beautiful, intelligent, wealthy and miserable. They'd have been better off if they were just clothes horse bimbos; their tragedy is that they weren't.
The Monaco royals, especially Caroline, have always struck me as being like a Ferrari. Take a Ferrari out on the racetrack that it was made for, run it at top speed, and it purrs like a pussycat; drive it in the city at 20 miles an hour, stop-start, stop-start, and the engine will clog up with carbon and give one problem after another. Caroline and Stephanie needed to have serious, difficult jobs - perhaps with some UN organization that does real work with third-world problems - that would have made demands on them; I think they'd have blossomed if given the chance to show what they could do. Let them lie around idle with too much money and they self-destruct.
stephanie is very much involved in the fight against aids. she has her own charity "Fight Aids Monaco" and is a UN AIDS ambassador.
caroline is involved with children's issues (she received a Unicef award a few years ago) and is in charge of Amade, which is part of the UN network of NGOs. she's also very involved with arts, having founded Les Ballets de Monaco.