gallery wall: to do

one of the things i want to do in my apartment is make a gallery wall: a wall with lots of pictures of different styles, frames, shapes, etc.  i have the perfect place for it: my entryway.  here is the entryway as of march 2015.

as you can see, the only things on the wall are at the end of the hall, as seen here:

i want to COVER the walls with photos and art.

i have found some examples of gallery walls that i quite like.  check out these photos from here.

i actually like how the one above is kind of hap-hazard and unexpected.  the one below, i like because it covers the whole wall.

and this one looks haphazard, but i think its actually quite organized.  i love it.

this one is really cool because it goes over two walls - so creative!

i really want to do this with this area in my apartment.

you can't really tell, but there is a big curved wall to the left of the couch.  i want to cover it with something and then have it feed through to above the couch.

what do you think of gallery walls?