The walls in my apartment are basically plaster over concrete. It makes it really difficult to hang anything without causing some significant, lose-the-deposit kind of damage. But this is a big wall that just can't be left bare. Vinyl decals are perfect for the job.
I used to have big, red poppies on the wall, until they started to lose their stickiness and their petals started to fall. I wasn't into that much veracity regarding their fresh cut flower realism. I'm hoping this one lasts a little longer, since the pieces are all smaller and lighter. This has been up since last July, and so far I've only lost one piece.
Both the poppies and this branch set are from Ikea. But now vinyl decals are just about everywhere. Even Home Depot carries Blik decals (love the Space Invaders). And holy crap - I see they've just added a whole line of classic Nintendo game themed decals. How fun is that?
And there are all kinds of people on Etsy doing really neat things with vinyl. Elephannie is one of my favourites, with lots of pretty and whimsical designs.