help for my not-so-favorite room

I am slowly but surely but making my room a home.

And my next room on the list is not my most favorite room... not because it's a bad room but because it's been sorely neglected. It was kind of an office, and then my brother lived there for a bit while he worked in Seattle and now it's just a mishmash of things that don't have a place elsewhere in the house.

We may have someone else staying in the house this summer and I want to finish this room up before then.

Here's the before-- the not so pretty pictures:

 yeah... see what I mean?

Now, the thing is while I could very easily decorate this room in swaths of bright orange and yellow and all my favorite colors and design choices, I want to still feature some of the husband's things. I want it to be a comfortable guest room that speaks a little to both of us.

Here are some of the things I'm thinking:

option 1: gray walls with neutral accents

one of my mom's staged rooms

option 2: bold stripes and white bedding

source unknown-- anyone know?

option 3: aqua with touches of brown

via houseofturquoise.com

option 4: mustard yellow

via aesheticoiseau.com

but honestly I'm so torn. All I know is that I don't want it too girly or too orderly. Any of your suggestions are most welcome!

xo, erika