One can become extremely determined and focused on music, in a highly professional manner, but there can be other sides of the coin of professionalism, that I think might be important.
Even if I have the opportunity to score for a genius filmmaker like Wong Kar Wai or Alejandro Iñárritu, I will still endeavour to make sure that the score is better than the film.
Always, ALWAYS believe in yourselves. Talent is nothing if you don’t believe in it. Do not waste time listening to opinions of people you don’t admire.