I am more of a Internet Explorer guy, but I have tried all the major browsers and many small ones! IE is stil the best IMO.
I have all three browsers (Opera,FF,IE7) in my quicklaunch bar, I just click randomly down there to get a browser up... I honestly can't see a real difference between the browsers besides some very MINOR things..
Opera is the best browser available and there's nothing anyone can do about it... One day everyone will use it and IE will be for the geeks.....
I've used Opera for a long time and love it. Its really fast and has built in IRC and torrent downloading. However, Firefox has a much larger user community and occasionally when i know that i'm gonna be browing for a while where some of the addons will really help, i use firefox. But Opera kicks IE up and down the floor!
I'm always amazed people like Firefox cause it such a dog on my desktop as these stats showbut I did find on my new Vista laptop it rendered and started faster than IE, so I may give it another chance. But just initial cold start is ridiculously long with FF. I've had Opera on every machine for many years but rarely use it. Hate to admit it but I use an obscure IE front end called Greenbrowser that is super fast and full featured.