I just want to say nice addition to the guide too. :3
Funny you should mention the part about purpose because I was reading a fic like that. Okay, so I'm a judge for this one shot contest at Serebii and I got this one entry which is short and has no plot. However, when I reviewed, I didn't write, "Too short, no action, last place." Instead, I reread it a couple more times to get what kind of purpose that writer did for the story and after I realized that, it made me love the one shot more, actually. I then went and review how the concept is very original and I would never thought of that before.