
The sheen of paint can dramatically alter the appearance of the color. While technically the color is the same, the amount of light reflected changes our perception. Glossy paint appears to be slightly darker than flat.
Flat paint is preferable for its soft, almost velvety appearance. It hides minor imperfections and can be easily touched up. However, flat paint also has a strong magnetic attraction to greasy fingers, dust and scuffs. The slightest brush can leave behind an enormous mark. Because it can’t be washed, thoroughfares have to be regularly repainted. Many of the paint companies are now selling a premium matte paint that contains ceramic beads that make it scrubbable. It is considerably more expensive. McCormick GenerationXR, available in the DC metro area, is the best of these products.
Eggshell paint has a very slight sheen. It has the advantage of being less attractive to dirt and marks and can be lightly wiped. It does show a noticeable sheen difference when retouched, however.
Satin paint has a bit more sheen, and is washable. It is often recommended for bathrooms and kitchens. Redoing one section requires repainting of that entire area.
Semi Gloss is used for doors and trim. It is easy to wash. Semi Gloss is reflective, so imperfections are noticeable.
What do I recommend? It is hard to suggest anything other than flat for wall surfaces from a purely aesthetic perspective.
Flat paint looks better, because the lack of light reflection allows the color to serve its function: to be a backdrop to the design plan. Your eyes are not distracted by surface changes or blemishes. However, scuffed and fingerprinted walls can be a disaster, so it is probably best to use Eggshell in homes with small children and pets.
I never recommend Satin. In my opinion, people are unrealistic about how long they expect paint to last. The days of oil based paint curing on the walls and creating an impenetrable surface are over. Today’s latex paints are easy to apply and even easier to paint over, and should be done so every five years.