In order of my preferences - 3 (actual photo, minimal processing), 2 (nice watercolor effect), and 1 (the very visible brush strokes in the sky are off-putting for me.)
Preferring for what? You don't say. To hang on a wall, I like to have a natural rendition of a photograph. I really do not like #1 because the sky looks very rough to me. I like #2 for something like note cards. This is just my opinion.