I'm looking at these pictures from my office monitor, seems that #1, #2 and #3 have a pinkish colour cast. Might want to check the white balance, or perhaps could be the actual scene or maybe it's just my monitor. Composition is cluttered, no main theme or object to draw the viewers' eyes.
I like the effect in #4.
Just my 2 rupiah worth. Keep shooting, that's the way to improve