This comes from Dr Leslie Baumann:
The Skin Type Solution 2006 by Dr Leslie Baumann MD Dermatologist
Which of the 16 skin types are you?
Dry (D) vs. Oily (O)
Oily skin appears shiny, and those who have it may prefer gel- or powder-based cosmetic products, as moisturizers feel greasy. Dry skin may appear dull and rough; dry skin types find moisturizer soothing and gravitate toward creamy makeup. Many people assume this parameter is solely affected by oil production, but the condition of your skin barrier - the moisture-retaining outer layer of skin - is equally important.
Sensitive (S) vs. Resistant ®
Sensitive skin flushes easily and may become red and irritated at the slightest deviation from its standard routine; it may also be prone to acne and eczema. While resistant skin sounds like an unqualified blessing, people with this type often need to use stronger products to penetrate their skin and achieve the desired effect.
Pigmented (P) vs. Non-Pigmented (N)
Some people believe that pigmented types are always dark-skinned, which is absolutely not the case. Anyone who experiences unwanted dark spots - melasma, sun spots, or freckles for example - is a pigmented type - in fact, 21% of visits to the dermatologist are for treatment of dark spots.
High pigment levels can lead to unsightly dark spots that don’t fade for months.
Dark spots can develop from cuts, inflammation, acne and increased Estrogen levels.
Examples are: Melasma (mask of pregnancy), Solar Lentigo (sun exposure and sun burns) and Ephelides (freckles).
Sun exposure accelerates skin’s tendency to produce pigment that creates dark spots, Melasma, sun spots and freckles.
As well, excessive heat/sun tanning can result in inflammation – which leads to dark spots where acne once was.
Avoid waxing, depilatories (Nair), peels, razors, spicy foods, saunas and tanning.
Wrinkled (W) vs. Tight (T)
Short of a crystal ball, this parameter is the best indication of how your skin will age, based on both genetic tendencies and lifestyle. You can't do much about your genes, but your daily routine can significantly affect your score on the wrinkled-tight scale: sun exposure, smoking, and poor nutrition, for example, all contribute to skin aging.
Two examples:
OSNW
Oily, sensitive, non-pigmented and wrinkled skin is characterized by acne breakouts or facial redness and flushing, or frequent skin rashes and irritation. This skin type has less protective skin pigmentation and therefore has a tendency to wrinkle due to current or past lifestyle habits that may include sun exposure or cigarette smoking. Recommended skin care products should contain sunscreen, retinoids, antioxidants, and anti-inflammatory ingredients.
OSPT - Oily, Sensitive (acne subtype) Pigment, Tight
Cycle of blemishes, followed by brown spots, followed by blemishes again.
Oil production helps preserve skin’s hydration.
Tight skin ages better than wrinkle prone skin
From mid-life on, skin can age better than most other skin types.
Pick up her book at your local library to say what she recommends for your skin type.