Well, I'm quite fond of the IE interface, especially the right click options. Most people use the mouse to navigate, but alt and tab are my two favorite keys, =).
I personally think that Nustcrape sucks. So I designed my homepage (currently down, I think I might have to change servers/domain) for IE, which is the only browser I use anyway. But just for the pop up filter, I'll give Opera a try.
BTW, isn't opera more or less same as ie? I thought they were based on same code.