Couldn't decide whether to put this here or in the "Off Topic" forum, but here might be better because some members might post about some serious experiences that shaped their life which would clearly make this a more mature topic.
Now, I'm not referring to your *B/DL side so much since there's already plenty of threads about what caused you to be as such (though I realize the same influences mentioned here could be involved in your infantilism feelings). Rather, what do you feel has contributed most to your personality makeup in general? What has made you an extrovert, introvert, stingy, generous, slow to anger, quick to explode, generally trusting of others, or overly suspicious, etc.? All the facets that make up you as a person. For example, your personality as it is today could have been shaped by inherited traits, early childhood experiences , school experiences, parental, sibling, or peer influence, experiences dealing with people outside of school or the family, and so forth. Any of these could have had either a good, bad, or negligable influence on who you are.
Myself, I think most of my personality was formed due to my dad, both for the good and bad. Good, because he was a very kind and meek person before he became mentally ill, and I've always been that way. Bad, because the mental illness kept him from being the dad I needed him to be, which caused me to be seriously lacking in self-confidence in anything I ever tried to do. I had no one to teach me the things a boy and young man normally learns from their father. To this day, I'm still leery of attempting something I'm not familiar with doing for fear of goofing up royally.
Who or what do you think has shaped your personality the most?