I've been using primarily Opera for years and will switch to Chrome on those sites that don't place nice. As of a couple of days ago though Opera has finished wrecking everything I loved about it. Being able to just type a website name in the address field and have it autocomplete the "www" and ".com" went away a few updates ago. It started giving you search results instead even though there's a dedicated search field next to the address bar. A couple of days ago with the update to Opera 11 they ruined mouse gestures. I'm now using Chrome with the Chrome Gestures and AdBlock Plus extensions.