How do I attain a more masculine personality?

No.13270057 ViewReplyOriginalReport
>22yrs old
>consistently weight train
>fresh out of uni

How does one go about totally changing ones personality?
I aspire to be more masculine and competitive, like MJ and KB for example.
Is it best to find role models and mimic them?
Or has my personality already crystallised to a large extent?
thanks for the advices