It's funny, but it's more liberating to set a camera on full manual and ignore the bleeping display, especially when you're outdoors on a sunny Florida day. The light changes in interesting ways from sunup to sundown; when I'm done and I go back and download the images, they're pretty close to what I both saw and experienced the moment I took the picture.
There is some post processing. I use Olympus Master, and within Olympus Master I increase contrast and play with the tone curve in order to make the colors more vivid than they already are. Depending on the lens (such as the Olympus 14-45mm kit lens at 14mm) I also clean up any pincushioning and barrel distortion the lens might add. I like distortion, but paradoxically I like my lines straight.
The pictures that follow are all from the E-300, using the Sigma 30mm f/1.4 along with the Olympus 14-45mm and 40-150mm kit lenses that came with the E-300 when I bought it. By the time those lenses are stopped down to f/5.6 to f/8, they are tack sharp and contrasty. I have more expensive lenses to use, but again, walking and driving with this kit in a Kata DR 467 backpack is fun.