Astrobiology, Cosmology, String Theory, Astronomy, all that jazz and it's wonderful branches much like @Noglastiaa. I adore it to no end, hell right now i'm just reviewing over Stephen Hawking's Brief History of Time so I can move on to the harder books and I'm so excited <3 I actually can't wait to get into the big chunks of it for my comic, ngl. /)>v>(\ baby steps~
Another thing is sociological construct like..I've taken forensics classes for fun/research as well so I enjoy talking about that kind of stuff. The study of the dark side and social construct in general has been a few classes I've taken for the same reason. There's also a comic I want to make about the mafia and that ended up making me purchase a LOT of books on the subject and now....I'm kind of a sucker for it. I love to sit down and debate the subject in a social and economical methods. As well as how similar aspects reflect both the patriarchy as well as modern "capitalism". (Feminist topics are a thing for me too, by the by)
And then you get storytelling deconstruction, the paranormal, Puerto Rican history since it's been so erased on purpose
and of course, animation!! \:D/