I present the friendly or the unfriendly side of me, whichever is safest. I really like people and am fascinated by them, but no way do I allow them access to me without consent. I don't live on the surface. However, I don't go out to deceive anyone either, so I *am* being "myself", just a version that I can defend until someone proves trustworthy, sort of like limited access to one's Facebook/Myspace page. Not that I have full control over myself. Being Fe primary precludes total control (much to my chagrin).
I find that wherever I go, whatever group I fall into, I have a persona, and that persona is what other people interact with. For instance, even if they know my real name, the majority may continue to call me by a nickname.
Do other NFJs relate? Do you acquire a persona?