i don't know why anyone takes it off (well, other than if they need to use their vacation time before it goes away at the end of the year, or if their kids have off, or stuff like that).
but because everyone else is off, the phones are quiet, the office is unusually laid back, i can get stuff done without more work coming in than i am getting out, it's only a 3.5 day work week to begin with and even then i can easily cut out early or stumble in late each day. why can't every week be like this? i bet next week will really really suck, if nothing else than just because i won't be used to a real work week anymore.