Post processing is how you make a picture into a photograph these days. So many can easily take pretty pictures, but straightening, cropping to just the right point of view, color balancing, and tweaking some levels here and there go a long way towards doing something the rest of the people won't bother with.
I've seen photogs at trade shows who sell their stuff as "I take the photos and hand you the SD card at the end of the night." That gives me the willies just thinking about anyone seeing my untouched photos. I consider the job about 50% done at the end of the wedding day. I spend another 4-10hrs making everything are nice as possible before anyone sees it. Though I do try to let some sneak peaks out on facebook, but I like letting all the guests upload their snap shots of the event and then BAM, the photogs stuff posts up and its 100X brighter, sharper, and just perfect.