Your second wallpaper is excellent man! I think you either should use all the same font/colour for the text or all different. Or use one font for the main writing and different font/colours for the slogans that you've mixed in.
It might also be better if you had the tezt aligned with the centre of the pictures on the left and between the pictures on the right. Hmmm... that might be hard for you to picture... what I mean is the pictures on the left are spaced well, and maybe the pictures on the right could be shifted down a bit so that they're evenly staggered. It's very important to have everything balanced, or if it's unbalanced, that it's pleasing to the eye. I really do like this, though, especially your last line.
Oh, and is that the standard 'Only GM' logo? I can't help but wonder if it wouldn't look better with 'only' to the left of the GM badge. Just a couple suggestions.