It wasn't originally a punishment, no. I enjoy it in the sense that I find it degrading but like being made to do things I don't like. It does get more sore as I'm forced to do more, but doing it for so long has helped me get used to fucking my ass relative to where I used to be
No, I don't regret the assfuck rule, I find it fun, it does hurt but not too much. I am glad you did it now and not in a few days, but miss is also considering turning it from each month to every year in which case it won't matter much!