I feel it's kind of necessary to mention this towards the scene selection:
Always know why are you using the scene you are using.
Of course, there are times when you just have that 5s block where nothing comes in mind, but you still should NOT blindly select a scene and throw it in. You HAVE TO know why you selected this scene, be it for sync, colour fitting, because you liked the pace, etc. Otherwise the people will come and ask "Hey, why did you use this scene here? I think it's badly synced." and you won't have an answer.
In fact, if you go through many great vids, you'll soon discover that all the scenes are there for a reason and nothing is out of place - which, in my eyes, makes the difference between "randomly chosen clips thrown together" and "videos" - and it's only up to you to decide where on the scale between these two you will be.
That said, I think that the AMV creation consists of about 3 main factors (this is where I differ a little from godix):
- Theme (which includes idea, story, etc.)
- Execution (which tells us how you managed to get the Theme part to the final video, so the viewer can see it - scene selection goes here)
- Technical (sync, effects, kewptangles)
And, not surprisingly, Technical aspect is the one that is the easiest to learn and improve. Sure, you can improve in ideas, learn to not make clichéd stories and improve your scene selection - but all of it is rather hard and comes with many finished pieces and vids, in my opinion.
(The only exception in Technical being beat sync - it needs some music sense, which not all people have, naturally. But that doesn't mean they can't make great vids.)
Basically, in my view it means that unless you have that hidden editor in you, you probably will improve - but only with lots and lots of work, in which this is simmilar to many artistic fields. On the other hand if you are artistic and just lack technical aspects, you will probably take much shorter time to produce great vids.
And then there's always Attack of the Otaku.
That said, I still think everyone can try to make as good vids as they can (or as bad as they can... doesn't matter much) as long as they have fun making them, that is all that matters.