paint or wallpaper alternatives?

paint or wallpaper alternatives?

So, I have a hankering to paint / put up wallpaper, but I might not be able to get it approved by my landlord (it will take some sweet-talking, or perhaps several batches of cupcakes...). I'm wondering if any of you have alternatives to painting and/or wallpaper, or know of removable wallpaper solutions. I'd really like some color to finally bring my spaces together. And, just so this is not a text-only post, here's my new bedding: New Bedding. You can take a "tour" of my apartment here (note: I need to update this a bit since I've changed some things, especially in my room). Thank you in advance!
Our home in Israel

Our home in Israel

broken bird nest fern

broken bird nest fern

Zenni Optical review with pictures!

Zenni Optical review with pictures!

Still in the midst of unpacking…

Still in the midst of unpacking…

Wildflowers all over my neighborhood.

Wildflowers all over my neighborhood.

Digging the Learning Curve: Evolution

Digging the Learning Curve: Evolution