they are not really doing feature walls any more. why not just do a headboard?

It all looks a bit masculine to me, so my pick would be #4. The wood headboard against blue wall.

3 and 4 are nice. But,,,

If you pick a different wood, one that isn't quite so 'country rustic', you can get away w/a lot more design options. you know you can use any type of TG wood flooring, right? I used a really nice french oak engineered flooring on my ceiling in my bathroom.

And look on craigslist for people selling their leftovers. you can find great deals. I found 200sq ft for mine at less than half of what it would have cost me.

if you do something a little more refined looking, you could do a nice velvet tufted headboard and still have it look nice. for instance, that french oak that i did would look great w/this black velvet.

if you do like the pallet wood or rustic reclaimed stuff, then maybe soften it a bit by doing this:

i think these are porcelain tiles, below

reclaimed oak in a herringbone. you could also just do this in a solid color, one stain.

these are just some other options so you won't have a wall that looks like straight pallet wood. that is trendy. look for the closeouts on some nicer wood

there are also wall papers and things like it that are easy to change if you choose too. less expensive and easier to put up.