I am proud to say my iMac, WiFi Router, External Hard-Drive and Printer all get switched off at the plug every night. I'm not so good with my PB, however, especially given the time it takes to boot.
You need help!
I can't get to where any of my stuff is plugged in behind my desk. I'd probably not switch anything off, anyway... but still.
My MBP sits on my desk at home, always on, but with the display sleeping after 10 minutes of inactivity. When it is in my bag, I usually put it to sleep. Sometimes I turn it off so it doesn't wake up freaking out in a little tiny confined space.