Bedrooms nowadays are not just a place where you can sleep, but a cozy, comfortable retreat and for others it's also a place to do other things.
Some would like nothing better than to read before going to sleep or during those long quiet weekends where they would like nothing more than to curl up in bed and read.
So for this owner they would prefer to have a nightstand for their convenience as well as bookshelves to store all their books.
It can also help them organize their stuff so it doesn't clutter around.
Other owners especially women would definitely want more space for their clothes, bags, shoes and other accessories so putting a bigger storage space for these things are very important and having a dresser would help as well.
So before rushing into buying anything it is better to take the time to make a list of what you would like to do in your bedroom and the items and furniture that you will be needing.
Yet amidst all these function and design for your bedroom you also need to think about the space that you have.
Is it spacious enough for all your furniture needs or can you do away with some of the furniture and instead find one that serves more than one function? Like having a headboard that also functions as a shelve for your books and for your night lamp and some other things would definitely be preferable than having a separate book shelves and nightstand.