This always depends on the image I am working with and how I intend to use it. Sometimes, if rarely, I will get exactly what I want straight out of the camera and I love those moments. There are times that I have used my camera to create fictional images, pieces of art or digital paintings that only pay passing homage to the facts of visual reality. But I most often use the camera to create more traditional images, landscapes, portraits etc. Each context has its own set of conventions and these requirements change with the intended use. A photograph used as evidence in a court case for example would have far more editing restrictions than a digital image used in a Surrealist Art Exhibition.
When it comes to Landscape Photography I am always trying to portray what I remember seeing. As a result I am most often satisfied only with the cropping and composition of my raw camera images. At the very least I will make minor tweaks to contrast, saturation and exposure. Sometimes however, I have to work a lot in post processing, especially when results are limited by the technology and night shots are a good example of this. It all comes down to one age-old problem, how much the technical limitations prevent recording what the human eye can see. As a result, I find myself compensating for this limitation during shooting (bracketing, cropping etc.) and/or in the post editing process.