Woo, it looks like I cast the deciding vote.

If nobody else votes, that is...
Billy Ronald:You've improved.

Yours ended up being my second choice. The main thing that kept me from voting for this one is the use of mountains. There's some "fudging" going on here and there, though I know that not everybody here would notice it. Nice use of clouds, though. I'd love to figure out how to make clouds like that move using FFCs, but the screen warp transition would arguably ruin the effect.
CastChaos:A lot of these tiles feel like they clash to me. There's nothing that incredibly horrible about the shot, but I find it rather uninteresting and just a little bit strange, mostly from the colors and the tile choice.
Gray0x:A pretty solid screen, I'd say.

The only real complaint I have is that I can't tell whether the trees are partway underwater or not. Also, the water is the same color as the greenery, so if it weren't for the floating objects, I wouldn't be able to know for sure that it was indeed water. Other than that, though, you have made a convincing and above average swamp area.
LostInHyrule:A pretty average Pure screen, I'd say. You didn't do much of anything that I'd consider horrible, but there ar a few things I'd change. First of all, the snow pushed up against the lower walls in the center of the screen overlaps it in a way that doesn't look natural. Rather than using floor snow tiles, you should edit out the snow from the wall tiles to use on LTTP lower walls...at least, for the corner tiles. I'd keep the straight ones as-is.
Also, the snow that overlaps the torch on the left should overlap the ones on the right, too. It looks better, and it's more consistent.
TriMaster001:This is a VERY solid overworld screen with no flaws worth mentioning at all. The only downside is that there are no enemies and no other action going on, but in this case, the scenery and the basic-but-well-designed subscreen are more than enough to make up for that.

I'm not sure whether this is a standard Pure palette or not, but if it isn't, then you imported or edited the palette quite effectively. Voted!