It is possible that some of us felt a certain primitive taboo about the skull, although the gravedigger, as I recall, was all for it!
Although Tchaikowsky's skull was not used in the performances of this production, its use during rehearsals affected some interpretations and line readings: for example, Rylance delivered the line "That skull had a tongue in it, and could sing once" with especial reproach.
Hamlet meditating upon the skull of Yorick has become the most lasting embodiment of this idea, and has been depicted by later artists as a continuation of the Vanitas tradition.
The name Yorick has most often been interpreted as an attempt to render a Scandinavian forename: usually either "Erick" or "Jørg", a form of the name George.
Two mini-episodes written by Steven Moffat, "The Night of the Doctor" (14 November 2013) and "The Last Day" (21 November 2013), were released shortly prior to "The Day of the Doctor", depicting in-series events occurring during the Time War between the Doctor's own race of Time Lords and his nemesis, the Daleks.