I agree, very nice on the second. Bottom feels a little clipped on the first one to me. I think there's sort of a bottom to the window, but it's maybe too close to the bottom of the shot.
#1 feels really incomplete for me, whether the window was larger than shown or not, the way the image is composed, it feels like the window should be larger. For me the interest would be in the corrugated wall and the nail holes, but its too dark to be appreciated. #2, I really like this one a lot, but agree with mmaria, I think a bit more contrast might give it just a bit more punch. #3 feels too tight of a crop, taken from a slightly different angle and including a bit of sky would help I think, but I don't shoot landscapes much so I'm admittedly not really sure.