Main complaint for #1, 2 4 is the background. You do not want the background to distract from your main subject. In #1 could you blur out more of the background? Maybe crouch down so only sky or something else easier to blur out is there. The location of the statue is not important, right? If so, the less we see of it the better. For example, let's say you have a picture of a cowboy on a horse. It might be important for your photo to know that the cowboy is on a prairie or in a canyon or part of a rodeo. His location is important, so you would have it shown clearly in the background. In #2, the mule is the main subject and it might be important for us to know that he is towing that wagon. So, move a few steps to your left, fill the background with the sign and wagon seat to go along with that nice animal. Or, maybe if you had moved a few steps to your right, you could have included more of the horse and buggy that is slightly in the background to let us know or understand the situation of why the animal is there. In your photo there is too much on the righthand side. #4, same thing. Get rid of the guy with the shorts. He adds nothing. He is too much in focus, leading our eyes away form the main character. May be if you had moved just a bit to your right with more of that background in there, the musician would have been more dominant, and we could still see he was on the street. So, I would suggest, take more of the same subjects from a variety of angles and pay a lot of attention to background. Cropping, too, can really help your main subject stand out. In #1 crop out the guy on the far right with the white shirt, then erase out the arrow-shaped awning. When your main subject was the musician, let him fill the frame! Your photos are interesting, sharp and in good color, and # 3, great! Go back, take more shots.
PS, Looking back at that mule. Try a close-up of just the head. or move slightly away from straight ahead and include more of his body, even better if you got him to turn his head. Get close to his nose and mouth, zoom in on just that, or maybe just one eye and blinder. Have fun!