I used to think I should follow all the rules in Composition. However, now I've realized what I should do; learn all there is about Composition but shoot all there is that I can see & appreciate. Oftentimes viewing shots by renown photographers, I see compositional rules get thrown out the window. Hence I say bend or break the rules, but ensure your pictures says something.
Sometimes I see that there is a picture to be had in a certain scene, but couldn't quite frame it. So I go around it in differing angles shooting till I find what it is. And then there are times, I know I just have to walk away and may or may not come back another day to try.
To me, Composition is subjective and it does matters. But it is subjective, and VERY individualistic. Tension, uniformity, rhythm of patterns textures or colors, forms & shades, contrasts, etc. It is all very much mix and match, the more you try, the better you get. The harder you look the less likely you will see it. The worst about Compositions, are cliche compositions. That I'd give a wide berth.