List names if they will illuminate the nature of their work. Giving the name of the director of a show you have designed is only useful if the reader is familiar with that director's work or would be likely to contact that director. It may be helpful to include some descriptive material to put your show listings in the proper positive context. Consider placing such auxiliary information, though on a separate sheet. Consider making a modular resume, so that different sections can be added or subtracted to suit your particular audience.
Philosophizing can backfire.
The reader may not share your philosophies. Continually strive to increase your repertoire of skills. Needless to say, the best such lists tend towards pertinence. Continually cultivate your pool of references. Who have established reputations in the field Who are articulate and have experience writing and reading reference letters.