I wouldn't say this is accurate as a personality test, but it's really clever all the same.

Positron -- You are the anti-matter equivalent of
an electron. You are frentic and excitable like
the electron, but you have an unpleasant
personality and tend to destroy everything you
come in contact with. On the bright side
though, you are very cool. You like hanging out
with Anti-Protons.
What kind of subatomic particle are you?
brought to you by Quizilla
Funny, I always thought of myself as more of a lepton....

Positron -- You are the anti-matter equivalent of
an electron. You are frentic and excitable like
the electron, but you have an unpleasant
personality and tend to destroy everything you
come in contact with. On the bright side
though, you are very cool. You like hanging out
with Anti-Protons.
What kind of subatomic particle are you?
brought to you by Quizilla
Funny, I always thought of myself as more of a lepton....