Hi egineerdude and welcome to the Q&A Forum!
Your photos are extremely interesting. I like your perspective (modified worm's eye view) as well as thesimplicity and symmetry you capture. It takes some common objects and makes them look uncommon. This is an effective technique for any type of visual arts, including photography.
You may find this article on composition interesting:
http://www.digicamhelp.com/camera-logs/random-thoughts/composition-for-photographers/We also have an article on various composition guidelines, which you and others may find useful:
http://www.digicamhelp.com/taking-photos/advanced-techniques/composing-photos/Keep experimenting with your camera. Thanks for sharing your lovely photos and we look forward to any others you care to share!
btw, you may want to try using Exposure Compensation for scenes that are backlit by strong light such as a bright sky:
http://www.digicamhelp.com/camera-features/advanced-settings/ec/