A Great Bugmaster

The great bugmaster has other qualities.

is a compulsive organizer
has a very big-picture view- instinctively knows you we have too many bugs and where new bugs fall in the great scheme of things. (Conversely, should not be too obsessed with details- as someone who will read and consider thousands of bugs, they can't often allow themselves to get bogged down in one bug.)
is good at automating the gruntwork, to make it less draining for himself and others.
strong leadership qualities- motivator, listener, etc.
participates in bug review meetings- but is almost never disagreed with, because he has sought out the advice of PM, engineering, and other factors, and intuitively gotten triage right.