Adored by the Network: Defied. Her videos on That Guy with the Glasses are released at a constant, steady rate, starting with The Black Gestapo, as it was the first episode to feature any sort of continuity. She also does not release commentaries of her own work on TGWTG because she considers them supplemental material for hardcore fans.
Colbert Bump: Featuring / promoting lesser-known critics is a staple of her show.
Creator Breakdown: Her theory as to why The Perils of Gwendoline in the Land of the Yik-Yak's second half includes among other things pony girls - he drove himself crazy trying not to direct porn for the first half of the film.
Mean Character, Nice Actor: Out of character, Hagan is very friendly and humble, frequently thanking her fanbase for their support.
In her review for Battle for the Bone, she even breaks character to say that the reason she does these reviews is to try to get more visibility for these obscure features and at least gen up some level of interest, and that while the film in question is shit, it serves as a unique example among the usual product of Northern Irish films and the creators could possibly do better with some money and support.
One of Us: Diamanda references video games, comic books, manga, trope names, and of course, Doctor Who every so often. She also checks into the TGWTG forum page every so often to say hi and announce videos.
Reality Subtext: A recent crossover with the Omega has Diamanda call her "adorable" and Omega finishing the review with: "Yes! I think she likes me!". Giovanni the talking lobster also suggests why the two don't just get married already.