as the other Opera user...
I use Opera because of the Carthago skin. Best skin ever. also because I can turn off gif animation, and then there's paste and go, creating custom searches from the address bar (all these things Chrome is finally catching up to). Opera also has a fantastic zoom feature, allowing me to watch Homestar Runner at 150% and not have to squint. And when I'm using a mouse I do like Opera's gestures. Finally, Chrome comes closest to Opera in allowing you to run without a status bar (even though the fools at Opera turn it on by default for new installs). Why waste screen space in the status bar when you can have progress in the address bar and link destination in a tooltip. FF 2 had a plugin for that, but FF3 doesn't yet (at least last time I looked).
Yes it is a shame about intercepting right-clicks. It does annoy me when I have to use Safari (on OS X) or Chrome (on Windows) to use Google Maps.
But I use Safari sometimes on Windows when I need a fix of properly rendered text, since Cleartype does not accurately represent glyphs.
Anyway, in my opinion, while Chrome is fast approaching Opera's level of coolness, I still regard Opera as the only proper browser, a tool for heavy duty surfing. The others are all only useful for looking at the odd webpage every so often.