Why I Don't Use A Rating System (Out of Laziness, Really)

To start off, I do get why rating things for reviews, either using 1-10 or F to A+, exists since it is perhaps one of the most simplest ways that one can look at a preview of said review and get some sort of expectations as to why a person thought that way towards the reviewed material. It works well when for the most part, one can agree with the reviewer as if each others tastes were similar enough where it could be a safe bet that if they liked it, so will you and vice versa. And yet it can often lead to a lot of backlash where the people who look at it go, "Why did movie A get score X when movie B got score Y?" either thinking that the score should be higher or lower. Honestly, I could just say that I am being lazy and that I why I don't use a rating system (and if I had to pick which one I'd use if I had to, it'd be a F to A+ type since the number system does have a flaw where most people will consider a 7 to be average, and below that the movie or game is terrible. I guess that could apply to the star system that below 2 1/2 stars could be called terrible). There is also the thing that came to mind when I watched a video about film criticism done by internet reviewer Chris Stuckmann (the link for the video if you are interested http://youtu.be/wJdfJVyDEQE) where he talks about how a ratings system can be sort of arbitrary and he brought up how he rated two completely different movies an A+ yet one is still better than the other, because the ratings applied to the specific genre so they are A+ movies in the specific genre but don't compare the same when put against one another. It also explains how certain movies on top 10 lists Chris has made where even though he gave movies higher grades than the ones on the list, it just depended on his feelings for the movies at the end of the year. And that might explain sort of why I choose not to use it for the time being, at least for the time I am doing written reviews (I don't know if or when I'll do video reviews). It can be a pigeon hole I guess for when you give something a grade for how you feel initially about a movie and when you look back at it, your opinion might change and you'll go "Why did I give this movie this score?" I think it's just better to say what I thought and whether or not the movie is worth watching or not. I might implement a score at some point but not for the time being.