You know you're a sysadmin when...
When you go on holiday, and the first thing you do is fix the wireless, then hook up only four devices because you're travelling light. Then, immediately after that, you start hunting for the documentation for the flat. Immediately after that, you get annoyed because there is no house manual, so you have to find everything out from scratch for yourself.
Mind you, after a week of views from the living room like this
I'm feeling much more relaxed than usual, and am almost not so bothered about things like documentation, which I'm sure will make my boss very happy ;-)