Two Faces:the Person We Are Now, and Later

Lately and over the entire course of my life I've been noticing that people seem to have two very different personalities. Oftentimes, it is simply their more professional side versus their more relaxed, personality-filled "home" side, but sometimes, it's a whole other side that not everyone gets to see. I'm not sure why, but I tend to see this "different side" in many people I know. Whether it's because I'm trustworthy and not quick to judge, or simply because I'm at the right place at the right time, I don't know, but I always seem to see a person's other side. It's quite blatant in certain individuals; they stick to a strict mold for people they aren't comfortable around or would rather not talk to, and then when they can be free of that mold, they turn around and are fun, cheerful, and exuberant. There isn't really a formula for figuring out exactly when someone will sort of "change" personas, but some people (and I find this rather amusing) have different tones in their voice when they speak to a colleague or unappreciated person versus a family member or close friend. I sometimes wonder, if we think we all have a personality, why do we sometimes have this different side of us? And I'm not saying everyone has it, some simply show it more vibrantly. Possibly, the professional side of us is necessary, to achieve our goals in a well-educated and sophisticated manner. But then, if we never had industrialization, where would we be then? Simply food for thought, I suppose. I've been rather frightened, myself, to see the "other side" of certain people, as usually it is their brutally honest side, where they let everything spill out-occasionally spewing out swear words and the like. But then other people, like me, open up a little bit more when around people they are comfortable with. It is a very complex world we live in, is it not?