I;m in my 20s and I've been going to PKI since I was three. I've had a season pass since I was old enough to need one. PKI is by far THE BEST amusement park I've been to(and I've done PKI, Carrowinds, King's Dominion, Cedar Point, Kentucky Kingdom, Busch Gardens, Disney World, and all of the Universal Studios parks). Yes, the lines can be long, but if you go Monday, Tuesday, or Wednesday, you will walk onto almost every ride. If you plan on visiting more than once, buy a season pass. You get into all of the other Paramount Parks(such as Carrowinds and King's Dominion) for FREE and worth the $90. The gold passes are very helpful, too, because the preferred parking is fifty times better than the(what felt like) miles of walking I used to do before gold passes. You get double rides on some rides and early ride times on most rides.
Pros: Clean, safe, fun
Cons: Long lines on weekends, always long lines at Boomerang Bay