Just Firefox for me (and with that the modern browers), even though I do some reasonable IE optimising for my skins, but if it won't work, too bad. IE is a worthless piece of shitty, idea copying, standards incompattable, forced onto THING, you can hardly even call a browser. I would say burden and security leak.
Opera is the best xDDD Talking seriously... I rather to use opera because I like the interface more than the one of IE 8, and it loads pages faster, Also now opera 10 uses a new compression tool that allows to load web pages way faster than IE 8 but the images are shown in low quality