We have lots of wonderful furniture, but many unique (and hotly desired) pieces can't be dyed, like e.g. the kotatsu table (another example that comes to mind are sylphic items, various pieces of glade and oriental furniture... you get the idea).

As a result -- depending on the color scheme of the room -- you either have to completely avoid these great pieces of furniture because the colors would clash horribly or change the color scheme of the entire room to match that one piece of furniture... eeeh, no.

So would be really great if we could dye more things, allowing for much greater customization with the same amount of furniture