#3: nice leading lines and clouds. might crop a bit of blue off the top, line the horizon up with rule of thirds.
#2. good sky, crooked horizon. the building is interesting, but perhaps try to get a secondary subject to help lead the viewer in
#1. great fog for atmosphere, gorgeous when nature cooperates like that. Tough call getting up high for a better view of the fog vs down low for a foreground anchor. I might have tried to use the tree just cut out on the right as a sort of anchor. Excellent low angle light shining on that fence, helps it pop. I would also crop the sky to rule of thirds and level the horizon.
great start!