I will give you my thoughts for what they are worth. In order of ranking I would say
1) The abandoned building with graffiti
2) The Waterfall and Bridge in Sepia
3) The colorized version
I think your strongest composition wise was the building, I think it is framed nicely and tells a story, I think the Sepia would look better as a Black and White, and the third is Muddled both top and bottom giving you an weird Horizontal focus/Color confusion.
But that is Me. ( My opinions are my own, and do not reflect any semblance of authority )