To wallpaper or not to wallpaper?

To wallpaper, of course.  

Not even a doubt.  In fact, I'm looking to do two rooms in wallpaper.  The first is our home office and the second is the master closet.  

Our home office is off of our kitchen and is one of my favorite rooms in the house. The kitchen has white counters, white cabinets, gray tile and the walls are covered in SW Snowbound (white) and SW Peppercorn (dark gray).  The office currently has the same SW Snowbound on 3 walls and SW Tricorn Black on the other.  I definitely want to keep the black wall and do the other 3 in wallpaper.  Here are my current favorites.

For the Master Closet I really wanted to have fun in there.  It's a small space and we can certainly get away with being bold. Our room is neutral with the same SW Snowbound White on 3 walls and SW Tricorn Black on the other.  Here are my current favorites.

If I were going to pick today I'd pick the Black and White Aztec pattern for the office and the second cactus paper. What would you pick?