Personally I avoid IE7 because the lack of addons that block some scripts. I use firefox, for the stability and saftey you get. I use the addon called ‘Noscript’ that blocks all scripts from working in your browser so those advertisements are all gone and they just show a white box. It helps when you accidently step onto a keylogger site or something.

I’d use IE if it was more safe, and had more skins hehe. Also, some more addons for it also, it’d be really useful. But, for now, it just isn’t one of those browsers I use often.