The Rules for Decorating an Older Home (Hint: Any Damn Way You Please)

My current apartment is housed in a building over 100 years old. And though it creaks and cracks a lot, nothing can replace the charm of tall ceilings, cove molding and other traditional building features. Yet I sometimes wonder if my furnishings do the space justice? Does my «Bohemian-meets-Maximalist-meets-Literally-Throw-Anything-Together» style really make the architectural details of this older building sing?