As for composition, rules have changed in different cultures at different times. Take some nice long walks through an art museum or library! There are "classic" tricks to use, like not centering the main focal point, etc. Maybe if we ask cynlee nicely she will orient one of the future Challenges towards classic (or perhaps, unconventional??!) composition? In many of your images, I get the impression you notice all that is going on around you; the feel of the wind, bird song, elevator doors grinding? And you are dissapointed when you can't catch all of this on a single still image? Maybe it would be an interesting exercise to try shots in groups of three, and post all of them together? This could help you then in thinking about what to concentrate on when doing single images. I'm just rambling. Anyone else have any ideas?