I regret not giving No. 1 a piece of my mind more often.

I regret that I never ask No. 2 "what do you mean, woman?" when she asks me "what do you need?" at the end of a heavy session. (Mainly because I suspect it's her way of offering a hug.)

I regret that No. 3 and I ended much too early, before I got everything I could out of hiring her.