In my humble opinion,

Best life style for retirees  is travelling around the world by a RV or a sailing boat, so that you have the power to choose not only the season of  the year, the climate and temperature for your comfort,  but also the very country you want to live in and experience,  and various scenery as your backyard....  not to mention to meet interesting people and taste delicious foods all over the world . Yeah,  that's  it !   : )