I need to learn what is good and what is bad.T
he hard thing about photography to me, is that it is an art form, and therefore subjective... so how do you create shots that the majority of people will like??
Well, first...it is difficult to define what is good or bad in photography. There are rules of thumb, and accepted conventions, but they are often broken successfullly. There are MANY elements in photography that form the
language of the photo. and they all work together to create a meaningful image. It is a life long quest to lean and implement these in the effort to make great photos. There are both objective technical elements and subjective/emotional elements. And, photography is a huge field, encompassing many applications, not all are meant to be art. There are so many applications - Eg: Documentary/ Journalistic photography, Commercial, Advertising, Product, Architctural, Archeological, Wedding, Portrait, Art/Abstract, Fashion, Outdoor/Nature, Sports, Astronomical, Geological, Medical, etc. etc. what is considered a "Good" scientific or forensic photo, might be awfu"Art".
Second, I would say don't worry about creating photos that other people like, unless you are doing the work for them. Create stuff that moves YOU, and expresses what YOU want to say/convey.
I understand and applaud your desire to learn the "how to" of photography, just realize that they are just the tools you need to express what you want to.
In your first photo of the wheels, I like the graphic elements. The repetition of the round dark wheels, set at an angle to one another. with the contrasting angular elements of the bricks and legs. I like this is Black & White as it make the graphic aspect more evident. I think the highlights in the bricks to the left are a bit over exposed. Regarding composition: I think that the crop is too off balance. I like that he wheels are to the right, just a bit too much in my opinion. And I don't think that the yard in the background really adds anything. Perhaps this could have been cropped a little tighter, or vertically.
Or, I think it may have been improved with another point of interest in the photo, such as dropped hamburger on the bricks, or an insect or a dog walking away with a hot dog in its mouth; you know, something that tells a story or raises a question in the mind of the viewer. The photo otherwise is more of a study in graphic elements.