After one hour lightly press a separate corner of a soft tissue to each of the four primary areas of your face. Compare the sections of the tissue to determine your overall skin type. Most people are. You may notice slight variations in your skin type with a change of seasons, particularly when you spend more time in artificially heated or cooled environments. Try the test at different times of the year, when you change jobs, or move to a different part of the country where a new climate or the local water might effect your skin.
Smokers tend to squint and pucker causing lines around the eye and mouth, so quit smoking.
You already know about sunlight. Excessive amounts of coffee and oily food may also lead to oily skin. Best to moderate your intake. Your skin is as unique as you are. No two people are exactly the same.