I lost count at 30ish, around eight years ago. I tried to reconstruct the number of visits I'd made based on old diary entries and recollection, and for awhile I tried to save my tickets so I'd recall that way, but now that I have an AP...
I'd say it's at least 50. Full-day park admission paid for all but two of those trips.
Jesus, that's a lot of money! I mean, that's at least a couple thousand dollars!
Then again, I didn't start looking like I was older than "child" until I was about 14...or when they switched the age of children from 11 to 9, whichever came first. So I guess I saved ten bucks a trip that way? Kind of? And I guess some of those trips were free because my friends' parents worked for the Mouse, and others cheaper because of Magic Music Days and suchlike. Still...it adds up!
The weird thing is that I still have my first ticket, from Spring 1991, and it cost $22.50 for a child's day pass. DL ticket prices have gone through the freaking roof since then!