It’s about conveying your enthusiasm. My readers like that enthusiastic voice. The dirty secret about geeking out is that it becomes a meditation. What starts as a frivolous “whatever” and people go, “whatever, look at that guy with too much time on his hands” becomes a meditation. Thinking about anything and doing it well becomes meditative.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.