Well, angst is a complex and complicated emotion. One might even say this emotion could result in spite which often drives artist in creating high expectations of success. This spite would come from the deep feeling of dread that is angst for if one feels imminent doom than they'd feel the need to defend or prove themselves. On the other hand one might say angst could hold an artist back in their work allowing the angst to lead to pure depression therefore lacking or having no motivation to complete or even start a work. Some achieve great works due to pure angst. Take Edgar Allen Poe for example, a man ridden with angst who created terrifying yet magnificent stories such as "The Raven" and "The Tell-Tale Heart". Angst is not what defines an artist temperament nor expectations of success for it is the artist that determines how their angst is channeled into such things.
