I will be staying a Chrome supporter, I suspect, for the following reasons:
Chrome is cleaner, has a less cluttered "out of the box" theme, and "lighter" feeling
Page load times in real-world situations feel identical to each other
The interface of GMail feels better in Chrome
Chrome's omnibox beats the seperate boxes of Opera
"Speed Dial" is the same to me as Control-T.
The tabs-on-top concept of Chrome is more appealing to me.
It might also be the time I've spent using it, but Chrome's URL prediction is simpler and tidier than Opera's. To be honest, I like my browsers to work out of the box, without requiring extensive customisations to get it how I like it, and for me Chrome ticks all the boxes.
On the other hand, I agree 100% that it's better than IE, and maybe now I'm at the stage of saying it beats Firefox as well - it's staying installed on my desktop, at the very least. Maybe one day I could grow to love it, but not until it has the same feel and function as Chrome.