This post tells you about the persons ability to being diplomatic. One of the traits about this character can be found in lower-case m's and n's.
In general if the second hump in the m is larger than the first hump, that is it slopes downwards, this person tends to be diplomatic. The more the slope, more diplomatic the person is.
Diplomatic means, using tact and sensitivity in dealing with others' remarks about you.
Many successful people are diplomatic, think of Michael Jordan!!.
If it is the other way round, that is if the lowercase m's and n's are sloping upwards, then the person tends to be more self conscious. The degree of self-consciousness depends on the slope of the m or n. Self conscious means excessively conscious of one's appearance or manner and how he/she is perceived by others. This means dependence on public opinion. This could sometimes lead to a feeling of pride and arrogance.