"The Bay" - this HDR photograph is a fine examply of why you should never delete your originals. Hang on to them. This photograph was one that was taken, did not look appealing, and was placed into a "rejection" file, forgotten about, and finally looked at again nearly a year later. After a little post processing work, this photograph came to life, and was given a home on Fine Art America.
Save all your work, you never know when you have a gold nugget in those images that you thought were junk.