Do you like coffee though?I have the so-called "warrior gene."
It's important to don't go into genetic determinism mental trips. According to Robert Sapolsky (a good researcher on the subject, though harboring false views of Free Will), it has a strong gene-environment interaction. He referenced Caspi et al. 2002 showing that MAO-A only has a strong correlation with anti-social behavior/criminality when individuals underwent extreme childhood abuse.
It comes down to the non-genetic impacts of childhood problems and issues of adulthood aggravation. The gene itself has a tiny effect.