If it's a small bathroom, I would go with #1, the white will make it seem bigger in there , yet it still has the theme of the outhouse. Also like someone else mentioned, it will be a lot lighter in there with the plain white on the top instead of a print. I have a dark curtain on mine currently and its so much darker when I'm in there trying to shave my legs.. I have to open the curtain hehehee.
#1 i my choice .... the others are cute though but such big patterns will really dwarf the room.
It depends on the layout of your bathroom and paint color. If you want to get fance with borders and stuff and possibly extend your design a little, go 1 but if you want to play up the room with subtle touches where its versatile, 2 for sure.
Number 2 is really nice, but Number 1 is better (less is more kind of thing) it does not "shout" as much as the others, and would blend better with the outhouse theme you have going.
LOL...I am comparing prices to be sure I get the best deal! I found that one and loved that it had the big outhouses but it was also white to let more light in! DH picked #2 last night, I will have to show him #5 tonight and see what he thinks!
My bathroom is also decorated w/outhouses. I have three outhouse ceramic lamps/lights, toilet paper holder and a few prints. Most of the things came from collections. com or lakeside.com