To rephrase: "[I think it's] very bland, it turns off [myself] before [I] even use it." It'd surprise me if most users pay enough attention to even see that a Bootstrap button looks different from a 37signals button or a Facebook button.
Bootstrap provides a bunch of reusable elements. You can still make the non-reusable elements (the layout chrome, logo etc.) as pretty/ugly as you want, and you can use those reusable elements to create very bland or very inspired websites.
"It'd surprise me if most users pay enough attention to even see that a Bootstrap button looks different from a 37signals button or a Facebook button."
There's a big difference between what a user can articulate about their experience and what they are affected by.
Bootstrap provides a bunch of reusable elements. You can still make the non-reusable elements (the layout chrome, logo etc.) as pretty/ugly as you want, and you can use those reusable elements to create very bland or very inspired websites.
Frankly, I don't see what all the fuss is about.