Philosophy as opposed to pure Theology (I am an expert at this I would say, Zaradi beat me because he's also an expert at it)
Computer Science (Tech but not AI, more privacy stuff, cyber security, web development etc)
^ this is especially true for ethics and philosophy of tech-based stuff.
Economics (but it bores me), politics (usually more political science and theory rather than law byt I am moderately good at the law debating stuff, it just rarely appears juicy enough of a debate to out my time and effort into.
Psychology/Psychiatry as well as Sociology (I always treat abortion debates as much more sociological than philosophical, regardless of which sode I take but definitely when on the pro-choice side and on this website I've never played devil's advocate on it but I can respect and understand the pro-life stance, it after all was how our species began to populate Earth).
I am better than most (but not an expert) at grinding elo at troll debates. I understand how to appeal to the audience but not fully so... It's my risky/rewardy way that rose so fast to #1 early on im the website's development (aside from winfarming vs Type1).
My weaknesses are extremely specific science debates or AI-specific tech stuff. Also, law itself, as opposed to politics is not really my forte. Stuff like Jury ethics, Judges, Cops, and clauses in law aren't my best suit.
I also am oddly skilled at debates about showbusiness, literature (fiction essentially). I've consistently been a formidable opponent even if I lost a particular debate on it, in my opinion.
I am mediocre at extremely detailed Theology debates.