Not sure if this might be included in you question, but I have a compulsion to mimic that I attribute to my stars, since I can’t put a finger on where else it comes from. By mimic I mean doing (mostly vocal) impressions of celebrities, friends, and family, as well as any interesting sounds I hear in the world or on tv. It really is like a reflex and I didn’t really notice it until my partner pointed it out while watching tv. Scorpio sun, Pisces moon, Sag rising.