I'm also sticking to 12.14 as this is the most productive browser for me. The great features of Opera 20 may be great for other people, personally I don't care about the speed dial, I'd rather have more capabilities in the bookmark bar. I think most of the new Opera features can be easily added to Chrome via Extensions, and no, it's not too slow after all. But features like patching certain URLs with personal CSS files, or the great editability of keyboard and mouse interfaces of 12.14 are unbeatable. I like Fast Forward and the Download Manager, Opera link (without google involved) and IRC, drag and drop everything and no-image-mode.
But most of all, I like that I always know what's happening, what is supposed to happen, what it means if something is off.
In my opinion Opera could've got rid off mail-client in favor of better webmail-support, and thrown the Unite and Widgets out to slim it all down and focus on the important stuff.
