Gonna rate the space one. It's really nice, but I think you should go deeper than stardust. Add more "spacey" brushing, and really set it off. 7.5/10 Rate this one please.
dont like the way the render is blured.and it gets kinda bright on the right the brushing is good tho.7.5/10
Not bad, but the cloud filter ruined it, I kind of like the way you added that guy going down the rope, 8/10
top: looks good except the text, it doesn't go with the rest of it - 7.5/10 bottom: eh, a space sig with colored abstract - 7/10
Hard to see the render, the scan lines ruin it, text could use some work, and the brushing is boring... =/ 7/10