In the next life I will buy de Gournay but until then I am on an extreme budget, so I have very little wallpaper actually on the walls. I do get samples of particular beauties and frame them (the toilet is a great place for this). Also, I sleep in the living room behind a wooden screen so I wallpaper the inside (I just put it up with those removable straps, so it can be swapped round. At the moment I'm sleeping surrounded by Borastapeter In the Oak which is beautiful.
I also love Thibaut reno stripe in green. It's too expensive but I put a search on ebay and came up with a length of the fabric for thirty quid. It is so stunning; I'm going to make a wall hanging from it.
As for offended white walls lady: this ain't your game! Start a minimalism thread and I promise to leave you undisturbed.