I think the big difference for me this time around, was that in the past, I was still able to get on most rides without a fast pass with a reasonable wait time ..which I think is 30 mins or under.
When I went this past January, almost every ride had at least a 45 mins or more wait. The popular rides had 90+ min waits.
When getting a Fast pass is Mandatory to avoid waiting almost an hour or more, it's not nearly as fun. At least not for me.
Also, Fast Passes actually changed my entire vacation. As I was only able to score a fast pass for Pandora on the last day of my vacation. Originally we planned to go there on my first day. So just getting a fast pass alone caused me to not only alter the parks I visited, but also dining reservations.
I won't be back for a while. Thinking of flying to Ohio and going to Cedar Point instead next year.