I usually work things down to 3 categories. The general filmmaking quality, which is close to objective,mand the completely subjective values of if I was entertained and if it made me think. Something that's poorly made is automatically a 5 or less, but I consider about 80% of wide releases to be competently made enough to avoid a problem with this. The most important factor is if I was entertained. From there, it's a relatively small swing on how much it made me think about it afterwards.

As an example, something like A Haunted House is poorly made, so that's automatically in the 2-3 range. Transformers movies are fine enough but aren't entertakning and don't challenge me at all, so those end up with 3s or 4s. A 5 is something that left no impression on me, because I will always pick a side on mixed things. Most Marvel movies are in the 6-7 range of things that I enjoyed watching but won't be thinking about afterwards. 8-10 are things that I liked while watching and I liked after watching. Usually things that are really well made or bring up really good questions but I'm not actually entertained by fall around a 6 or 7 too (Boyhood is an example of this).

By far the ratings that I give out most often are 3s for bad and 7s for good. If it's bad I asses how much I actively disliked it vs how much I was just bored by it and throw a number at it. If it's good, I start at a 10 and go backwards for things that didn't work. I will give a couple of 10s annually (I had 2 in 2012, 1 in 2013, 2 last year). I very rarely give out 1s because to me a 1 is something with absolutely no redeeming qualities whatsoever, and I generally don't watch things like that (also, I am usually entertained by things that have no positive filmmaking qualities. The Room, for instance, I enjoy a lot, so I can't give that a 0). To get a 1, it doesn't just need to be awful, it needs to offend me (God's Not Dead is my only 1 from this decade).