I write a lot about structure because it helps gives a shape, whereas many amateur productions flop around because they have no narrative spine or sense. There's more to it than that, obviously, but it's something sadly lacking in most fanfilms.
People in fanfilms talk a lot about character, but few of them that appear are very compelling. So many fanfilms have the characters reacting to the events instead of driving the action, which makes them uncompelling as characters no matter how much dramatic backstory they're given. Who they are isn't interesting. How their character compels them to act or fail to act is what makes them interesting.
Most fan films or stories seem to be obsessed with world building and details and minutiae instead of focussing on what's truly important. I just read a comment in the other thread I did about filmmaking, where I said that I think the space battle in TWOK is more effectively dramatically than the battle in Nemesis, but the other guy said that's bullshit because the battle in Nemesis has more tactics.
There's a big difference between making a story, a character, a scene work and only filling it up with details and backstory.