I've always contended that the house position will provide the most personalized interpretation of the north/south node axis. The sign, which is just as important too, will be less individualized seeing as the North node takes a little over a year to move through a sign, so it will apply collectively to a lot of people. The sign position indicates the evolutionary impulse of a group of souls/individuals who incarnate within that specific window of time. So naturally we would share these same tendencies with anyone born within a year of us.
Most astrologers seem to think that the sign position indicates the more psychological characteristics one is acquiring in this life (albeit rather slowly) and the house position shows the arena or stage that one will acquire these skills, lessons, talents, etc. I feel that it's a mix between the two, as the "psychological" characteristics of the house position seem to be quite accurate in most cases as well.
So for you with North Node in Scorpio in the 9th house you are learning how to merge your own values/beliefs with those of others, how to share or merge your resources with others, how to connect deeply on a more soul as opposed to a superficial level. Scorpio north node is all about transformation, so the natives tend to be rather stubborn and have many patterns of behavior that are deeply ingrained and hard to get rid of. In this life they are learning to let go of things, and to understand the true impermanence of life itself. The 9th house indicates that these lessons will be learned through such areas as travel to foreign and or exotic places, by meeting and associating with people who are unlike yourself and your surrondings. The 9th house is also symbolic of the higher self, and inner spiritual guidence, which means that native north node 9th house people are also learning to validate their own impressions and to trust their inner voice more than others, there's usually a lot of doubt about one's hunches. The tendency is to look outside of one's self constantly for confirmation, but most of the time the answers you already knew.
Sorry, just had an afterthought.
Does the degree make a difference as my nodes are at 29 degrees? Would that lesson the effect scorpio and bring more of Sagg feel seeing as it's in the 9th?
I agree with kaminari, I would say that it would be more magnified in this case, and the 29th degree is very important and a critical degree. Also consider that the Nodal axis moves backwards through the zodiac as well, so if it's at the 29th degree then it is just moving into scorpio from sagittarius, not leaving.
The 29th degree is called the anarectic degree, and it symbolizes a kind of threshold or barrier from which karmic energy has built up over a long period of time and has reached a point where it MUST be expressed and utilized. If you believe in past lives and such, then this is likely a very critical incarnation for you and it emphasizes the importance of fully activating your north node this time around, the issues it deals with are probebly more familiar to you than you realize.