You mentioned "chief pilot". I'm assuming there is a standard operating manual or a variant that you agreed to when you signed the rental agreement? If there's a clause in there that prohibits you from takeoff/landing with a tailwind, I'd say you have no excuses. If there isn't, I'd say you made a PIC decision, and the outcome did not bite you, your passenger, or your airplane, this time. Was it the best decision? No. Was it a terrible decision? Eh.
In your situation, I'd ask if saving a couple minutes flying the standard traffic pattern is worth the risks you added to your operation should things go badly. You could have taken off into landing traffic. Not everyone self announces at uncontrolled airports. You could have executed your takeoff roll when the wind suddenly picked up. You could have experienced an engine failure on climb out and the wind could push you far enough away that limits your options. Your decision to conduct a short-field takeoff should have been your final hint as to whether your decision is a good one.
But all that aside, was your decision in the best interest of safety for you, your airplane, your passenger, your friends, your family, or the public safety? Ponder on that next time you fly. If you find yourself making a decision because it's "more convenient" without considering the risks, I suggest you read the FAA's handbook on Risk Management, and participate in some WINGS seminars on the topic.