I'm not going to say anything here that hasn't been said by hundreds of people long before this, but it will make me feel just a little better to say it. In my own, expletive-prone fashion. Those of you with delicate sensibilities may want to turn away from the screen for a couple minutes.
I've been using Foxit Reader for quite some time now, years in fact. It's small, light, unobtrusive, and just fucking works. In other words, everything Adobe Acrobat is not.
Somewhere between version 5.0 of Adobe Acrobat (15 megs) and the current version 8.x (holy Jesus 167 fucking megs...