What 3 things do you worry about most in photography?

3 things that worry me most in photography are the lighting/exposure.In my opinion this is the most important thing if you can't see your picture i when its too dark or too light and you thinking that it will turn out to be a great picture. its not like a phone were you can just see if it is okay. the second thing i worry about is obviously is my picture is good enough or do people see a good picture like i do and are my expectations the same as other people stuff like that.the last thing i worry about is can this picture be good enough for one day be a job is my concern