...as finding a gaping hole in the scholarship on a topic you are working on?
Seriously: I'm working on, say, the Great Pox Outbreak of 1402. And there's a huge literature on the topic of late medieval pox in general. The GPO happens to fall smack in the middle of the five-year-long War of the Three Henrys. Massive historiography there, too, in three different languages (one for each of the places contributing a Henry to the war).
And yet, somehow, none of these historians really makes much of a connection. Or, if they do, they mention it in a two-sentence aside. As I see it, these things are connected in a number of ways. Yet Pox scholars don't read most of the things on the War, and Henrico-bellists only mention the pox outbreak when it kills one of the major generals.
This, for me, is great.
As is the fact that both Poxers and Henricans (all three languages of them!) have meticulous footnotes.
Thank you, one and all.