I've tried the Fluid HD, but for some reason, I don't like it. I know it fills my entire screen but it doesn't feel right. I have a 17" HR screen, so with the default setting, I get a lot of white space. The compact view that the default setting gives makes it easier to read and navigates, whereas the default looks to big and messy.
And oh, maybe the fact that I also don't have ads on my view may also contribute to this view preference.