Interesting... I like the gradient you used, and this repeating shape you created is very cool. Has a nice sense of depth to it (the way the "palm trees" become smaller and smaller as you move from the primary palm). Well done...
I like this one a lot as well: very nice colors: I like how there is just a hint of midnight-blue between green. Somehow this makes for a very nice desktop in my eyes. And yes, the shapes are cool.