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!
Poinsettas

Poinsettas

Succulent ID

Succulent ID

garden pron!!!

garden pron!!!

Intro and HELP!?!

Intro and HELP!?!

New gardener in Dallas, Texas.

New gardener in Dallas, Texas.

This yours?

This yours?