I think I've developed one as a child. My dad was an intolerant, abusive scumbag who tends to punish me over the most minor reasons, telling me to "Grow Up" whenever I wanted a hug from going through a very hard time, and doesn't seem to care what happens to me when I go around the neighborhood without adult supervision. He tends to threaten me "Kill Me. Dead. Graveyard Dead." (Yes, he actually said those words), gets annoyed when my mom vacuums or when I blurt out a swear word (Heck, he doesn't even allow me to say something as mild as "crap", yet he himself has no qualms blurting out S-words. Hypocrite. -_- ). Because of this, I've unknowingly developed his personality, even though I'm trying to be more respectful and nice as much as possible.
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Please be respectful, I'm kakologophobic (fear of swearing, namely the strong ones)