I've actually modeled myself after many Alpha Males on TV and movies as well. It's perfectly fine, infact, most of us do it without realizing it. Most of us are a combination of our parents, friends, characters we've observed on TV, and so on. We take qualities and bits and pieces from other people and create ourselves out of them.
But that's the key, take positive qualities you like from other people and incorporate them into your existing personality. Never try to completely imitate someone else because then you'll lose your own sense of identity.
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