With flash. Not the best example in the world but you get the picture. (No pun intended) Notice how not only is the lighting on his face more even, but his eyes are more lit up and any lines on his face have been softened. This was taken with the pop up flash on my camera. If you're really going for a nice portrait as opposed to an evenly lit snapshot, it might be worth the extra effort to pull out the big flash and match the strength of the flash to the available light.