Firefox is really good. The add ons are just amazing. Chrome is when I need fast things done. IE isn't that bad...needs some extreme tuneups by Microsoft and it could one day be really good.
But seriously, I know I've ragged on IE, a lot, and there was good reason for it; because it was garbage compared to other browsers. Now, it's a bit better, but I still wouldn't use it. Same reason why I won't use Norton antivirus. I had too many bad experiences with them in the past and there are others I'm currently comfortable with.
Avast free antivirus. Used to be AVG, but the toolbar annoyed me and I couldn't figure out how to get rid of it, so I switched. But with Norton, the problem I had with it was it took a lot of resources and would constantly have pop-ups. They probably fixed those issues by now, but I still won't use it.
I use Firefox and Chrome. I switch back and forth because I like options on each one. Although I do have to say that IE is a lot better than it used to be