I have a 4:3 CRT and would never consider a 16:10 LCD, the latter of which I have used for a few years by the way so it's not a presumption.
The way I have my desktop and browser toolbars set out leaves me with a square of working space, which i think is perfect. Say if the forum rules were changed to allow for 150x130 avatars, I'd be able to show more of Nanako's hair but would feel like something is missing from the top and bottom... Hm. I do hope my monitor never breaks because these days it'll be hard finding a truly satisfactory replacement.