My parents are my biggest fans. They let me call and rant and worry, then pick up their handy Dictionary of the Theater and look up the words they didn't know.

They assume if I don't call it must be tech, and are ok with a 7am phone call. They always have the address of the theater I'm working in to send flowers or a card for opening night.
My friend (and occasional coworker/set designer) who will go on break and return with two coffees and a pack of cookies without prompting.
My younger cousin, a 15-yr-old self-proclaimed theater dork, who puts everything into perspective. When she came to see a recent show I did, she was THRILLED to sit through load-in because it was "so cool." Right, not everybody has a job like this. It IS pretty cool.