With the modern world being largely visual in associating anything with music, there is something to be said for a composer's skill set to work with visuals, such as with scoring for film, whether it be short film, or a full blown production. Having the skills to create great music is just one facet in the arena of scoring.
Being apt, efficient, and to create something on-the-fly for a director is paramount. Also, having an environment of technology that provides quick turnaround on submitted stems is necessary. I find that remaining in midi till time of render, as an example, increases the possibility of an idea being utilized.
In the process of working with a director, cuts and adjustments to any given scene can be challenging to keep up with and thus it is important to be fluid with this scenario. In remote work with directors, communication breakdown occurs more often than not & re-do's become problematic or a large portion of work ends up not being utilized. Always pay attention to the director/producer guidelines!
What is also important is listening to reference material the director provides. Having a keen sense of how to compose around dialogue is also key. Any of you composers scoring for film/documentaries? Would love to have your input.