I would make her a little bigger in the frame. I'd also add a buzzard or two flying about in the background somewhere and probably go with a bit of funky text. Feels like it needs somethign to sell the wind, though - her cape is sorta flapping up on it's own. Dunno how you'd really do that, though :/. Those are all personal ones, really, though.

Generally it feels to me like a wall that needs to remain fairly open and empty - it's in the desert and there's not much in the desert. You could add another cliff edge in the bg, but given the perspective it'd have to be a really big cliff :/.

tbh, the main thing I'd work on would be completing the ends of the cape, a neat extraction and then it's kinda done bar the frills.

the thing that bothers me about this wallpaper is that there are LOTS of unused spaces. i think it would be best if the overall character image was bigger, or maybe fill up that space with additional character or jo's mech.

the sun also needs work... add some light rays or reflective effects on it and elaborating on it would be nice.
her extraction also seems a bit flimsy, as there her cape edges seem cut off on each side.

in a high tech city that bakuten takes place in, i would've probably have chosen jo to stand on top of a building with other buildings towering over her or something like that, but im sure you could make this work. good luck!

That's what I meant. Minitokyo is bigger than APnet, no doubt, but it doesn't have Apnet's quality, IMHO. I like it here, and the features of the site (and not just the walls) are really nifty. Like userpage customizatio...

Welcome back. From Minitokyo, eh? I see you came to your senses. =^^=

Good luck on your walls!