the text on the first one needs a bit of work --- and gaara looks a bit squished up and anorexic lol... second one is good though -- good colors but maybe you could move the text beside his head on the right side near / in between the two circles to make better placement
I would work on depth and effects. You've got some elements of depth in the first but it could be better. Both lack lighting.
when resizing your renders/stocks hold shift to keep the correct proportions. they text isnt too good either.
yea i know how to resize by holding shift i dont know what happened tho i must of messed it up when doing it, i kinda didnt want to do much on text il work on it next sig