how about k-on for one example? if memory serves correctly most of that took place in the clubroom, and if you shave their heads it would be a bit hard to tell them apart.
I didn't mean to make it sound exclusive to kyo or even necessarily bad for that matter, just saying is all. Recycling backgrounds has been around for as long as animations has, the flintstones was famous for it. at least now it's not so noticeable.
But I must say, one of the nice things about anime or animation in general is the ability to do and show elaborate and creative things that would be way to hard and expensive to do in live media and limited to films with massive budgets like Avatar. We have limitless medium for imaginative and fantastic spectacles limited only to the creator's imagination, but then you reduce it all down to the same 3-4 girl Archetypes hanging out in a highschool club room with the option of lusting over a guy with the the depth of a cardboard cut out and a random gimmick to vainly differentiate the series from previous works, maybe the girls are part of a band, maybe they're detectives, maybe they like role playing or they're all otaku or maybe they're all just lesbians who knows, it just feels a bit uninspired.