There's no shortage of topics I can't discuss, because in my experience 95% of people have incredibly little intellectual curiosity to the point that its depressing.
Weird historical hypotheses like reptilians in written history, British Israelism, lost technology, or the various theories about the missing time hypothesis. Also "controversial" history like studying the actual backstory and reasoning for Fascism, Communism, colonialism, the Confederacy, etc, instead of merely condemning them as bad for being different from western neoliberalism.
"Mechanical" stuff. Cars, tanks, airplanes, tractors, trains, etc. That sort of thing fascinates me to no end. The older and more obscure, the better. Spent my boyhood tinkering with old John Deere lawnmowers, and reading books about various machines. Steam locomotives are amazing for no other reason that they are massive machines that can travel at over a hundred miles an hour with nothing but fire and water. Reading about the history of the automobile from the technical side is intriguing with the myriad of incremental improvements that casued them to evolve into very different machines every few years, from decade to decade. The early history of aviation is also interesting tos tudy, with the various balloon and zeppelin contraptions, as well as the primitive attempts at powered flight prior to the Wright Brothers.
Also have a strong interest in philosophy and religion, particularly gnostic- and hermetic- derived ideas. Most people have either never heard of them period, or regard them as nonsense without seriously researching it because whatever religion they follow said so. Eastern philosophy is trendy in some circles, but Western philosophy outside of the conventional religions is basically ignored, which is a real tragedy, because Gnostic and Hermeitc ideas had far more influence in the West (and East) than many people know, particularly in the High Middle Ages and the Renaissance.
As you probably guessed by now I am also into a lot of conspiracies. Many of which cannot be discussed irl because they are either too niche, not socially acceptable, or both.
