I happen to really love white rooms.
My favorite is the sort of beach bungalow look. Start white white main stuff--and add loud pops of color in natural tones.
- Wood elements. It didn't mention what kind flooring you have, but light tan wood flooring is perfect. If not:
That piece of wood looking thing is actually a rug.
You can also use fabric that looks like wood to cover mantles and rafters to give the look while still having something easily disassembled.
- A fan is functional AND cool looking.
- Splashes of blue on the walls via art simulate the beach scenes.
- And some greenery via fake or natural plants helps too! A nice tall potted plant helps freshen up the room and looks good!
- A few quirky colored pieces around will complete it. And best of all they can all be easily disassembled and taken with you.
Good luck, whatever you decide to do!