I think that Opera is a very underrated browser, it has power to back it up and even seems to be faster than Chrome. However i don't use it myself and have no plans to.
(Although i didn't plan to move away from Firefox, but now use Chrome exclusively:D)
Yeah i don't like the feel of opera at all, even though it is quick . . .
Currently using FireFox though I do sometimes prefer Internet Explorer. Have used Opera in the past and wasn't particularly impressed. Never used Chrome etc though.
So I voted for FF :)
Not a fan at all of IE9 though, hate having favourites on the wrong side for starters
I don't think that one could declare a winner but there certainly is a loser in the poll and that would be Microsoft's Internet Explorer.