The first one is a pretty nice drawing. The second one is really nice, the faceplate of the 360 is done very accurately. Third one is a cool idea, but the C4D could be blended better. The fourth one is really good, since you added the flowers....I thought it was a real stock that came like that lol. The fifth one is a cool concept, but there could be more done to it. The sixth one also is a cool idea, but the C4D isn't really blended good.