#2 is my favorite. I can't explain why related to color because I'm color blind, but it just looks prettier to me than the rest. It "pops"! Although all 4 patterns look good, #2 looks GREAT! Good luck. Can't wait to see it in fabric.
Revision to first opinion, if you are trying to get a "True Fall" Look, I'd go with #1, it looks the most "Fall" to me, however, I stand by my first choice of #2 as my favorite.