Given the medium, I think the most can be gained by focusing on composition. An interesting thing I've noticed is that given the iPhone is such a common sight nowadays, nobody takes notice of what you're doing with it.
If you look carefully at the photo in the top right corner, you can see a face in the silhouette. No photoshop, no manipulation. Simply caught by pure chance. A reminder that photography captures fleeting moments, so gotta be out there more…taking photos.
I'll take that as a positive sign.
Although the scenes above are mundane to me given I see the same thing every day…this may not always be the case. Things change.