Alright, here's a chart I put together based on my personal view on Force Alignment:
This chart will help explain my theory. The Force itself is, in essence, life itself. It has no pre-set alignment of it's own, and is something of a blank slate. However, the Force can't be called upon and applied in it's original form. Depending on how it is called upon by it's users, the nature of the Force changes.
For instance, if the Force is called upon by one's fury or fear, the nature of the Force would reflect this, becoming dark. As the nature of the Force is changed, the way it affects the user follows in suit. The Force constantly flows through the user as it does in all life, so when it's nature is changed that nature can physically and mentally effect the user, which in the Dark Side's case leads to corruption.
The Force is called on by emotions, be they of serenity or of passion. The stronger these emotions are, the stronger the call and the greater the benefits. However, the alignment and nature of the Force also becomes more intense, and thus it's effects on the users grow. This is why those who are deeply nested in the Dark Side are physically corrupted by it's power. On the chart, the strength of alignment is displayed by distance from the center, the Force's natural state.
Another important factor is that there are not simply two ends to this spectrum, as the chart is not simply a line. There are two middle ground alignments between the Light and the Dark, which I call Chaos and Balance. Despite the fact that both rest between the light and the dark, Chaos and Balance are polar opposites in principle. Balance describes when a user is able to synchronize their passions with serenity, and Chaos would be the inverse of this philosophy.
The chart also helps depict the middle ground between Force Alignments--Which is helpful in the case of beings such as Kyle Katarn, who while mainly light side aligned, appears to lean towards the "Chaos" aspect of the Force in his use of both the Light and Dark Sides in an unsynchronized fashion. The same can be applied to the Imperial Knights, who appear to nest themselves between Light and Balance.
That's my theory on Force Alignment and it's mechanics, I'm curious to see what people think of it. Note that this has nothing to do with Force Aspects such as the Unifying and Living Force, which I have a separate theory concerning.