For example, my mother would complain about my travel photos that didn't contain people, or would look for things like whether the people looked happy. She couldn't care less about the rule of thirds, bokeh or dramatic lighting.
Don't get me wrong, artistry and craft matter, but I think they would be considered "enhancements". Most people would gladly accept a poorly composed image of a loved one or special moment because they value the memory over other attributes.
Heh, this is one thing I regret about my past photos — I have plenty of travel photos, but very few with myself in them.
And while I know my composition and lighting fundamentals, my photos will rarely be on par with someone with the luxury to wait for the right moment, or something from a postcard or the best of Flickr or 500px.
Who knows if that will change in 20 or 30 years.
What you bring to the scene is you and your relationships with the people and things there. That's your marginal advantage from your photos.
You'll get better photos by taking candids than posing portraits everywhere though.
There are some cultures that prefer the posed portraits over candids.
I spent 25 years telling people to "get out of my photos" in landscapes. Then something clicked in 2008 and I became all about people (to the point of running a Wedding/Event/Portrait photography business for a decade or so:).
I'll still take landscape photos, and I enjoy them, and some of them are decent... but I still get most excited when I capture a particular expression on a person these days. Go figure!
Anything you work on in drawing & painting carries over to photography near 100% as well.
And there are plenty of famous photographers who have been great musicians as well who would argue that music & photographic composition are somehow related as well.
Thanks for sharing your other comments, btw.
In short, there are images that I used to be really proud of that now are honestly a bit torturous to look through.
Photography courses teach basic composition skills that you have to know -- that is, if you follow them blindly you'll get decent and non-boring photos -- and then you can develop your style by selectively subverting them. I suppose getting your own style is about breaking the rules to get more "interesting" and unique photos.