I really don't know a whole lot about it, aside from the fact that it's old-fashioned combined with hardcore industrial gadgets and technology. I mean, I know what it looks like as far as clothing, weaponry, buildings etc. But what else characterized steampunk? After all, you can't exactly say a sci fi or fantasy or horror or romance is categorized as such because of the stylistic appearances of the setting, right? Are there other characteristics marking steampunk?