#1: I like the sculpture/fresco/whatever the word is but I've never cared much for the photo-of-art type photo. (Usually, and in this case) I don't think it demonstrates your skill as a photographer, and art is always much better viewed in person.
#2: I like very much. Great silky texture of the water over the stairs and a wonderful sense of mystery as your eyes wander down the staircase to who knows where. Love the rain drops at the bottom, too.
#3: Is a bit busy, I think. I'm drawn more to the mural at the back, but then that's kind of obscured by the poles and this basketball game which seems to be in the way.

I think what I'm trying to say is, I don't know where to look.
#4. I also like this a lot. Took me a moment to work out what it was (I didn't see your title), but I actually liked that about it. Love the bold colour and the simplicity of the shapes.