Deciding on narratives is something, I think, you do before you start a story. Narrative does not bother me much. There is always room for change. It doesn't tell you, however, when to publicize an episode. I must admit, I'm having difficulties with this question too.
It's really about how much you want to show, Marwolfer, and also, about how quickly you want to finish.
Fluidity - or should I call it flexibility - is a wonderful asset, though. Dialogues can take up time, but add liveliness. Glitches in the game can be fun to show or boring depending on how often it happens.
When I'm playing, I can feel my Simmies speaking in my head. I go to bed and dream of them.... They all want a role to play, and they want to remind the public that they are there, even if their tasks are fulfilled (yes, show-offs, or what?). Adding quirkiness to a character, which can be dispalyed over and over again, is a splendid tool.
I've read quite a few stories, where I thought the balance was exactly right. However, despite these excellent examples, I'm still dreading the start of my second Immortal Dynasty. I'm a stickler for detail and quite OCD about almost everything. Their characters, their clothes, their aspirations, their love life, their house... I could go on forever.
It even translates into the screenshots I take. No plumbobs, or half walls on display for me. But what do you do when you are in mid-game and something extraordinary comes up with walls half or totally down? It's always a scramble. Can I steady my nerves and get to that "pause" button quickly enough and take the shot?
I think, the frame I'll use will be centered on my Sim's wishes, achievements and birthdays (deaths). If anything special comes up - you know, when the game throws surprises you - I'll include that or make a special chapter for it.
