I've never owned a season pass, and I think I'd get bored with a park if I went more than about 15 times a summer. Of course, it depends a lot on whether or not you go by yourself or not. With company, I could go a LOT more than if I'm by myself. This past summer, I went to CP twice, once with my sister, and once by myself about a month later. The reason I went by myself is because MF was closed the day my sister and I went (The only day the whole summer, I think. :( ) Anyway, I stayed from about 9-4 the second time, and skipped Raptor and Mantis...two of my absolute favorite rides, because the wait was over an hour, and I didn't feel like standing in line for an hour by myself to ride rides I'd ridden a month earlier. Of course, in the morning, when I got a ride on MF, Mean Streak, Magnum and Gemini within an hour and a half...I was happy. If I'd had company, I'd have stayed till the park closed.
Ok...on second thought, if I had a season pass, I'd probably go a lot, just for short amounts of time. Maybe 4-5 hours at a time...ride 5-6 coasters and leave. Ride different ones the next week, then play around a bit...that could be a lot of fun. I'm going to have my first park season pass this year, for SFDL. It's two hours away, but I plan on hitting SFDL two or three times this year, plus SFNE, SFGAdv, and SFWoA...and that's worth $50. :)
Jman