It's interesting that so many of the comments here (and often, those made about Bootstrap in general) focus on the aesthetic of a few form elements and not the utilities that come with the framework. Understandable, I guess, as they're the most obvious when you load up the page!

I've been playing with the 3.0.0-wip branch for a little while, and I think that there are a couple of really cool features that should be noted above the cosmetic - the single, fluid grid; font icons by default; and a mobile-first design.