IE6 and under:

. Not gonna fool with it.
IE7 and beyond: I dig the hell out of it, and is alot more stable than firefox. My major gripe is just how goddamn big the buttons and tabs are, and it looks kinda drab. Plus, I have really had fucking nightmares about the favorites star. Time to fiddle, as it's the best outta the box.
Firefox: Creepy hippie shit. Addons nice, Furries not so nice. Quick. FF3 sux quite a bit less, but I still don't like it. Berkeley open source sluts are only interesting for server related shit. Ubiquity cool, but way too much made for plebes. Gonna attempt to make something similar; only instead of the English language, it shall use Larry Wall's Practical Extraction and Report Language syntax (complete with regular expressions, shell opening, the lot. This will be a loooooooooong endeavor.)
Google Chrome: Tabs on top. Fucking fail.
Opera: Nice, but real unacceptable jankness occasionally. Close tab button too fucking small for 13-inch 1024x768
Safari: lol mac cigarillos (no filter, but I'm on a machine that is keylogged).
I'm starting a quest for the ultimate browser. It may take a lifetime but I will make something into the greatest browser ever made.