I used Ie until about a year ago, at which point I switched to Firefox. I was perfectly happy with it in that I could COMPLETELY personalize it to my taste and needs then i somehow managed to download a virus or something and Firefox was constantly opening new tabs full of ads and just general shit so i downloaded chrome and got on Ok with it, I like the way everything appeared so much bigger cause of the lack of a tab bar, and a other things about it. Initially I was reluctant to download opera, however I've just downloaded it now and I'm seriously impressed so far, mainly at the size of everything and the way it fits my screen.
Planning on trying a few others too, see which I prefer.