Slackware FTW. This seems odd since its considered a very hands on distro. However it is the *only* distro to work on all the hardware i have out of the box. Even wireless drivers! The hardware includes a new as of 2 months quad core and even a 3 year old laptop and a 5 year old desktop. Its stable and does not demand I download gigs of updates and patches all the time. Its easy to install on machines with a permanent airgap (aka no network). Typically out of the box config is pretty good and much more secure than most. Its also one of the oldest distros, my first slackinstall was slack 1.0 in 1997 IIRC. Back then you had to write your own video drivers for X
It should also be noted that Ubuntu would not even boot on my laptop. Fedura F*** up a auto update and broke the whole update thing (after updating OO 3 times to the tune of about 5Gigs of downloads with deps).
As for turning off, I just use the off button