I have some days where I'd even want to show up in the office, paid or not, just to work on some of our projects (and I actually enjoy most of my coworkers). I have other days where you could give me just a plane ticket to some Tibetan monestary where I could avoid electricity (and therefore computers at all) and I wouldn't bat an eyelash.
Depends entirely on what bugs I've written lately and how hard they're biting me in the ass.