Why not ? It depends what you are looking for at that moment.
If, in the future, your tastes change, a few things get ranked "above" what formerly held your top slot. The top slot was never "200 absolute points," it was just "the highest single ranking"
Although, I do see the coarseness of a new #1 bumping everything down … and forcing a reconsideration of whole blocks of rankings … arriving at "groups" … and basically a star system.
- [0] my mood changes more often than my taste do
If I've spent all day on calls, then proceed to watch, for example, anything Aaron Sorkin, I'm likely to treat it less charitably (because I'm tired of flapping gums) than if I watched it after a week in the desert (and human contact is wonderful).
My mood would color ratings as well …
How would one flatten the effect of mood on a either-or ranking system? Is it possible?
I suppose the system should ask for every movie watched how they'd rank given a particular mood ? So it's "is A better than B when you want something with deep thinking to watch, is A better than B when you want something easy to follow ?" but it has its own can of worms: sometimes I want to watch something with deep thinking even though I am in the mood to unwind...
All in all, I think it's a waste of time to catalogue our own tastes and try to build a personal recommendation system. I hope/think/want to believe thank knowing ourselves gives better reward.