Sorry I'm late to the party. It looks like you got home to very nice fall conditions, and hopefully had some great hikes. I think #4 will be my pick for favorite of these as well, although compression for the web has made the detail pretty poor, but I'm sure the full resolution is beautiful. In #2, the swirling effect is interesting, but takes up so much of the foreground that it makes me a bit dizzy to look at it! In #3, I like the composition, but the lighting takes the emphasis off of the falls and makes the log and foreground leaves into the subject. Maybe burning the foreground leaves a bit would return the eye back to the center. I like the last one a lot as well, but think it may have been better without the fallen logs transecting the image into 2 halves at the midline.
