I've had Opera for like 3 years now, but I think it's time for a little switchy-switch. What browsers are your favorite? Any little conveniences worthy of noting?
Safari and Firefox are on the stay-away list. Chrome and IE9 are the two I would be comfortable using for overflow or when I need to be logged in multiple accounts on certain sites. Opera still has far the most features, but Chrome is slowly getting certain goodies Opera has (referring to custom search engines).
Oh god anything, but don't use firefox. On serious part, as previous opera users I can say google chorme, because it has taller website display, if your eye is used to opera you will hate other browsers because they display shorter websites. If you used special deal there is also some in google chrome store.
Firefox. It's a great, fast browser that supports tons of web standards (HTML5, etc), and has loads of customization options and extensions. And it's open-source.