Impulsiveness: Romeo's impulsive nature leads him to make hasty decisions without fully considering the consequences. This is evident in his sudden decisions to marry Juliet and go to the Capulet ball, both of which contribute to the tragic events that follow.
Rashness: closely tied to his impulsiveness, Romeo often acts rashly without thinking things through. For example, he kills Tybalt in a fit of anger, which sets in motion a chain of events leading to Romeo and Juliet's tragic deaths.
Violence: Romeo's proneness to violence also plays a significant role in the play's tragic conclusion. He engages in several fights throughout the play, leading to the deaths of Mercutio and Tybalt, further escalating the conflict between the Montagues and Capulets.
Emotionalism: Romeo's emotional nature often overpowers his reason and leads him to act irrationally. This is particularly evident in his intense grief after Juliet's apparent death, which drives him to take his own life.
Lack of self-control: Romeo's struggles with self-control contribute to his tragic fate. He is often unable to control his emotions and actions, which leads to several reckless decisions throughout the play.
Naiveté: Romeo's youthful naivety makes him vulnerable to manipulation and deception. He believes wholeheartedly in the power of love and fails to recognize the potential consequences of his actions, which ultimately lead to tragedy.
These undesirable qualities in Romeo's character play a significant role in the play's tragic events, highlighting the complexity and flaws of human nature.