You have a 3-4 bedroom house and will not allow family members with kids to live with you.
Family members with no kids are considered on a case by case basis and vetted only after a long process of investigation. Are they neat? clean? Respect and care for their own possessions? Can they walk in a store and not touch one thing? Only eat in their dining room? Appreciate a good song or movie? OCD?
A tape measure is permanently next to your equipment for measuring the distance between speaker and wall, the other speaker, distance between the equipment and sides on the shelf, your sweet spot...
You once had a cat who scratched a grill on one of your speakers and you respondent quidam. You no longer have that hairless cat.
If someone touches a piece of your hardware you, out of reflex respond with an inside ridge hand to their jaw. As they regain consciousness they hear you apologizing and explaining that it was pure reflex and that they should have warned you when you first got there.
When someone asks if you read you respond "Yes, several hours a day". But what you mean is you read forum discussions, articles, you research various gear that you are interested in.
You have more invested in electrical infrastructure in your living room than some small businesses.
You are browsing Audiogon looking at items for sale even though you don't have the money to buy at the moment. You select a item to read about it and the first thing you do is see if they are local.
You decide that when your lease is up you are going to turn you car in and not get a new one, to save money for new equipment. Instead you will drive your 86 Jeep. To work. In Arizona. In 100 plus temperatures.