well, the cats out of the bag, I am pretty bad at webdesign itself. I'm a programmer, and kinda still live with the html knowledge I got about 15 years ago. I do tables to get things on the right spot, I use frames, know absolutely nothing about css (except how te spell it), and somehow I'm able to get on screen what I want The only new stuff I know are the quirks of xhtml.
Coding itselve is my game, and a game I play pretty well. I am pretty good at learning along the way without any real indepth study on languages I stumble upon.
So for debugging stuff, I don't know the difference between browsers. But for just surfing the web, I don't see any reason to pick FF over IE (or the other way around for that matter).