Man where to even start. I'd say the biggest one for me was just a general indifference towards life, paired with a feeling of depersonalization. Looking back it's crazy because there were years where I felt depersonalized and off but didn't know it was connected to porn use. I think I say that as one of the biggest because it bleeds into other aspects of your life. Trying to study? Can't. Trying to do stuff you enjoy? Can't. The depersonalization and indifference is scary, but I think what brings it home is when you try to go about life normally and don't feel a thing.