I would take my family back to DisneyWorld in Florida :) We've been there twice before, but haven't been back in years. My parents say they'd always like to retire there, but I think a holiday for now would suffice :) And that's where my family and me are truly happy. It'd be a two week holiday, we'd rent a villa with a pool and stay there for two weeks.. go to the parks, see Shamu again, go swimming with dolphins, go to the waterparks etc. Yep, that's what I'd do :)