I'm studying A Level photography, and I've taken a dozen of quality photos with a strong sense of composition, but all of them are unrelated to each other. My question is, does photography have to have a theme to be part of a series of photographs? I'm also considering the interesting idea that there are no guidelines to photography and no real rules only the ones that we decide to follow. Some people have self-imposed rules that provide them with creative guidance and/or personal style, but even those rules can be more like guidelines.
Online I've found exhibitions and competitions presenting "open" or "no theme" presentations, but from a range of photographers, not just one persons work.
The only sort of photography I can relate to this in this idea that I've found so far is this gallery by Gerry Dotto.
Online it's hard to find opinions on this so I'm asking a question.