I think one of the key lessons of the novels is that every faction is more than just any one or any group of cheractors. So, while the novels have absolutly shaped my view of Steiner-Davion siblings, or of Warrior House Hiritsu, or of the ELH or Dragoons, I try not to let that shape my view of any faction as a whole.
Now, I'll grant that a big part of this is that I've gravatated twards under covered factions like the FWL. Again, there my greatest take away from the novels is that anything is possible, that each faction has a relititively large tent with a diverse croud under it. So I don't feel constrained to model my play after what I saw in Star Lord or Ideal War or what have you (unless I'm being a Knight of the Inner Sphere, I suppose, but I don't do that often).
I think the one key exception is the Jaguars. They were my first love, and their depection in the Pardoe books absolutly set a view of the 'ideal' Jaguar in my mind, even though we usually see flawed or outlier charactors in these books. Had I been older, perhaps I might have seen that more, but as a youth, it made a lasting impression.