To my untrained eye, many of these images are as good as anything else I've seen from humans. What qualities make me say that? Your images create a visceral response. They evoke a lot of interesting thoughts and feelings. If anything they remind me of 20th century modern art. Very impressive stuff. It'd be amazing to make these bigger, ensure texture is there, print them large like an oil painting.
I need more $$ to feed the GPU monster, and then you will get more texture :)
This is more of technical issue that can be solved quite easy, but you are right, most of them lack details and texture.
