yeah, I would go every year but don't have the money! so I alternate like so:
this past year I went to Hersheypark, Cedar Point, and SSKK (no one there, it was great even for a subpar park!)
the year before that I hit PKI and HW, both very good visits.
usually I try to get family vacations to go near parks so I have an excuse to spend a day (or maybe two) at them.