I like them all.this is my take on them
#4: If the trees and nearby grass were not so white/blown out (or was it a frosty morning???) and that branch from a different tree wasn't in the top left of the sky, the photo would have been awsome. It would be interesting to see more reflection in the frame.
#3: I like the perspectives of being from the level of the ground aiming up. The sky gradient is also rather pleasing. Is it me or is the tree and the horizon a tiny bit off vertical?
#2: I dont think you could have done much to improve this photo. Its a rather simple photo, but I have looked back at it a couple times. the first time i just saw the trees and the vibrant reds. After I looked at it i noticed the beautiful mtn's in the background. Very effective image.
#1: What a great find. Lots of layers and detail. I really like your choice of composition and the colors are very well done. Great job.