I never maximize my windows (unless I'm playing a videogame or something). Like others said, narrow windows are much easier to read. Plus, I keep my IE windows near the top of my screen, so I can read IMs and IRC in the background...my old monitor actually had IRC burned into the screen, I had it visible so often
Weird part though, I have this weird privacy issue where I never like people to know what I'm doing...I wear headphones when people are in listening distance, I shut the bathroom door to brush my teeth or comb my hair...and I keep a window maximized in the background all the time, so I can quickly click on it and cover up any websites I was looking at. No idea why, I just do.
_________________
I'll brave the storm to come, for it surely looks like rain...