Would you buy a bathroom theme kit

Theoretically? Defining it as a "bathroom" kit neither sells me nor loses me, but I can appreciate a kit not necessarily my style and there are certain types of plumbing fixtures I could use.

More variety in off the grid tubs and more lavish showers would be appreciated (it drives me a little crazy that the only unmatched shower is the decontamination unit).

I do quite like the idea of a "nature" themed kit with an extravagant rainfall shower.