Me?
I own about 20-25... somewhere around there.
I watch them a few times a week and most are like anal, girl/girl and group sex.
I understand getting bored with the same stuff over and over, which is why its great to own a lot, then go back to other ones you haven't watched in a while

Edit: I've also bought more new ones, since I was changing all my old ones over to DVD like you were going to do