For me it was a realization that I was powerless to improve anything else in my life until I got over porn. Relationships, work, hobbies, my spiritual life especially... they all had peaked (at very low places) and weren't going to go anywhere until I made myself a new person.
Thanks be to God I didn't have any big dramatic moments. If I had slid further into the porn world... that is, completely thrown the idea of rebooting to the wind, I probably would have been thinking about getting into hookup stuff, especially fetish based. But, that is a lot of "ifs"... I always wanted to reboot, and I'm not sure I'd have the nerve to do the hookups even if I had let that go.
I will say I'm also lucky in that I didn't have to deal with it while married. I told myself the lie for a long time that if I was married I wouldn't need porn, but I know that I would have been a husband trying to deal with a porn addiction, and I'm thankful that I didn't have to go down that road. My sympathies and support to the guys who do have to deal with that.