I want to paint this room.....help me!

So, my spare room is blue. The sellers painted it this. It was a fresh coat of paint and I decided that I could live with it because I was painting three other rooms.

Now, I'm ready for change......

Part of me wants to go bright and expressive---a bright Kelly green or soft violet. Part of me wants to go very soft and feminine.....with a creamy color, but then again, my office is creamy and my bedroom is "Sand White"........

What do you think!?!?! I am going to keep the white bedding for now.