No, don't take a friend that makes great Instagram pictures to take your band photos! No, don't be so damn artistic that you don’t know what the pictures are supposed to portray! And for f**k sake, if you don't know how to work with colours and lighting and make then in black and white, we just know that it's not good. Black and white can be cool, but you need to have the option to also have it in colour.
I got a phone call from a booker that will take out some bands at our festival. Of course, he has no chance to listen to all 150 bands that are on the site. Instead, he went into the bands that he knew and after that those that had great pictures and said something. Usually, if the band has a professional picture, they usually have a full show.
I could see so many good bands just be overlooked because they haven't taken the time to work with the picture. Yes, it needs to be a good photographer that knows about lighting that should take pictures not your best friend with a system camera. This is what gets people to look at your band in a roster or a post.