The important thing is to stay out of the box with regards to "rules.
Actually, I would say just the opposite applies, if you want your images to have broad appeal.
Venturing outside the box rarely foments broad appeal, as visual artists have discovered over the last couple of centuries. Guidelines cannot effectively be disregarded without reason. In other words, the justification for disregarding a guideline is in large part based on why the guideline exists in the first place. If you do not have a well grounded understanding of the guideline, it's unlikely you be able to subvert the guideline effectively. When a guideline is ignored just for the sake of ingoring the guideline, the resulting image usually looks like poo.
The guidelines of visual image composition are also based on some logical precepts and esoteric truths.
The larger an image element is, the more visual weight it has.
An unbalanced image is less pleasant to look at, as a balanced image.
Complimentary colors are more logical and pleasant to look at, than discordant colors.
Horizontal lines foster a feeling of stability and tranquility.
Vertical lines foster feelings of strength and dominance.
Diagonal lines foster a sense of movement and motion.
There are many more.
Good composition is usually the blending together of several guidelines.
In fact, all of these compositional suppositions are also used in graphic art, not just photography.