Sun is the father, and perhaps authority. The sun represents identity and the manner in which male role models may have played a part in Sun/south node issues.
Some indicators show that the person has a different kind of Dad, that he is not like other dads. Then there is the step father or fathers and other male role models that may all add to the confusion around "who am I".
I have Sun (6*)conjunct my South Node (4*), as well - in Sagittarius, in the 11th. The Sun rules my 8th house.
Any thoughts on how "father issues" may be represented by this? (or any other thoughts on the Sun/SN) I have had some "doozy" father issues - identity crisis being only one of them.
The only aspects made (other than the obvious opposition to the NN) are a tight sextile (1* orb) to my Moon in Aquarius/cusp of 2nd house, and a loose square(4*orb-Sun, 6*orb- SN) to Saturn in Pisces in the 2nd.