Your temperament is no badge of honour
Your temperament isn't responsible for your actions. You are.
Neither is your zodaic sign, or strengthsfinder result.
When people say "I can't help it, that's how melancholics are", or "she lied because she's a pisces", what they are saying is this: "I don't care enough to take responsibility for what I did. I'm not ready to improve now. I can blame that behaviour on something else."
The sooner you take responsibility for your every action, the sooner you can experience the freedom that comes with choosing.
On the flipside, it is truer to say “I caught that error because I paid more attention to details”, instead of “I caught it because I’m choleric. Cholerics pay attention to details.”