I really like #1, but right where the water flows over the log there is a stick standing up that bugs me. The branch in the foreground isn't that big of a deal for me, just part of the natural surroundings.
#2 I don't care for - just seems uninteresting to me.
Love #3 & #4
# 5 - I would like to have seen a bit more of the sky, but still a nice shot.