Passive aggressive thank yous
Inside joke acknowledgements
Jokes in footnotes
Unacknowledged puns
Saucy comments like “as much as researchers would like this to be the case..”
Random trivia in footnotes
Unnecessary appendices (songs listened to while writing, lists of weird historical events, etc)
Citations of yourself, because goals
Unnecessary citations of your academic friends
Song lyric quotes in italics as chapter openings
What else you got? Looking to spice this document up.