As others have stated, you must learn the rules to know when to break them. But I see one rule you have forgotten: let the subject guide the eye into the image. The policeman in photo #1 leads your eye out of the frame. If you had shot the image with him on the left looking "into" the frame it would have been much more effective. The other two pics do this.

Also, already mentioned, but should be emphasized: Try different aspect ratios. Try verticals, try square, try custom sizes using your photo editor. You are not limited by old fashioned paper sizes or the size of your sensor.