Google Chrome. I saw the Ad for it on Google, and thought "well now I've downloaded it I may as well see it's use through" Now I've just gotten used to it.
However I'm getting pissed off with how often it fucks up and dies on me. A lot of the time I can't see images and get a little grey icon with coloured shapes in instead, and it also keeps saying "This link appears to be broken" when it's clearly not because a quick refresh does the trick.
Another problem is Chrome seems to have issues using windows hotmail, I don't know if it's because it's Microsoft vs Google or just something else, but I keep getting sign in errors, again that a quick refresh sort out.
I would go back to Internet Explorer, but I can't be arsed.