Well, if you are going for coasters, then Cedar Point is an obvious choice.
My vote for best well rounded park with shows, rides and just a wonderful atmosphere, it would be Dollywood. That is the one park besides Kings Island where I have had a season pass before. I have probably visited Dollywood more than I have visited Cedar Point at this point. Don`t get me wrong, I love coasters, but Dollywood is just something special.
Disney World is a must to, Having visited both Disneyland and Walt Disney World, if someone has visited neither, I would recommend going to WDW, as there is