Sheen changes how a wall looks
Sheen is how much light the dried paint reflects. Flat and matte can make small flaws less noticeable. Eggshell and satin reflect more light. Semi-gloss and gloss show surface imperfections more clearly. Washability depends on the product as well as the sheen.
Walls, ceilings and trim are different jobs
Ceilings are usually flat, so light does not bounce off them. Living-area walls are often eggshell or matte. Doors and trim are commonly satin or semi-gloss because they get handled. They do not all need to match.
Kitchens, baths and hallways
High-traffic and humid rooms benefit from finishes that tolerate cleaning. Check the manufacturer's care guidance rather than choosing on the sheen name alone, since washability varies by product.
Higher sheen needs better prep
Every patch, dent and roller mark shows more under a shinier finish. If you want a higher sheen, expect more preparation in the scope.
Test before you commit
Look at samples on the actual wall, morning and evening, in daylight and lamplight. Floors, furniture and neighboring colors all change how a color reads.
Planning a project in Staten Island, New York City or New Jersey? Call (718) 984-0719 to talk it through.