This. A friend of mine is an electrician. He did his apprenticeship with a guy who worked a lot with high end residential clients (i.e. stately homes — this wa

This. A friend of mine is an electrician. He did his apprenticeship with a guy who worked a lot with high end residential clients (i.e. stately homes — this was in England). He says the one of the most important things that he learned was to clean up after himself — which talks to your respectful point. It made him stand out amongst his peers, and is one of the factors that goes a long way towards repeat business and referrals.