I agree with you about "slice of life" games. While you want to be serious about the writing, in the end it's all fluff. People play in these games because they want to be able to write a piece without having to treat it like it's a mini-series rather than a daytime drama.
With that said, I also agree with you about specific genre games. When you have a history that's set in stone, you really need to elaborate on time, places, and events because it shows how your character is connected to it all.
When it comes to facts though, I've never written just a pure facts entry. I've always written a biography and maybe sometimes included a set of facts, mainly trivia or random quirks that don't relate to the personality or biography. I tried doing facts with this character, but I keep getting massive paragraphs that I end up not feeling satisfied with. Right now, I'm using a system of bullet points for specific events.