The first is good - if it were mine I'd crop some of the plain white area off the bottom - not enough texture there. The haze or fog at top works well.
The fourth image has enough dark area to allow a lot of cropping variations - try some.
The fifth I don't quite relate to, for some reason. The colors are nice, and the trees and mountain are picturesque, but I can't quite balance that with the building. Maybe some cropping there too.
Overall, some really good material to experiment with.