I was always a big fan of Opera, used it religiously for years - was excited to see they switched to WebKit and are going to switch to Blink (I don't know if they have yet) - but Chrome just has the extensions that Opera doesn't. Have you tested if the Chrome store works in Opera? When the beta first came out I tried it and managed to install a few extensions from Chrome store to Opera and some worked, others wouldn't.Hate Chrome and Firefox. Chrome has major leaks and security holes. Firefox is slower than Molasses.
I run Opera. It has more positives than negatives. But it's compatibility on certain sites is still an issue (certain government websites don't necessarily support it - so I use IE in that case). Opera smokes Chrome and Firefox in speed. Opera is a like cheetah... Chrome is a turtle and Firefox is a slug.