I'm glad this question came up. I live in Upper Michigan, and can only go to PKI once every two or three years, when we go to Cincinnati to visit relatives. I just got back from Cincy today, which also included a visit to PKI. I guess I love PKI because it was the first theme park I ever went to.
Even though I know whats coming, I can never quite prepare myself for the feeling that I get when I first see International Street laid out before me. I rode my first coaster at PKI(Beastie ) And The Beast is my favorite coaster on the planet! I guess I agree with BoddaH1994, that PKI is one of the few places I can go and not have to worry about anything else.