Cool! I forgot to mention Mercury/Virgo too, but edited it in above
The drugs, I just meant that you know how people with the Venus/Neptune square always get informed about the likelihood of escape through drugs. Well, in hairdressing, drugs are very common in salon staffrooms, and definately after hours. Hairdressers like to party and often stylists are still tripping on Saturday morning whilst cutting your hair. Salons are always pumping with music. It only just struck me now that Neptune may be the common denominator to the imaginative/creative works and the drug/alcohol/escapist culture, in general. So, I'd definately say that Neptune seems prominent in the trade. In regard to your question, I'd say for imagination.
Mercury/Virgo for perfectionism is nice, but its a trade, so I'd assume you can perfect your skill without a prominent Virgo.