Why am I making this?
I see too many inaccurate ratings and uninformed talk about ratings within this community. I understand that there is subjectivity within the rating space at some degree, but the current rating space is much too inaccurate for it to be chalked up to that. I will be trying to give the most objective scale.
What are the ratings included here based off?
I specifically chose faces that are well-known in the community and commonly cited as this or that. Although I eye-balled a lot of ratings here, they should be non-controversial and quite accurate ratings based off community consensus.
Where are you getting these percentiles and rarities?
I'm getting them off a bell-curve with the mean as 4.5 and standard deviation as 0.625. They will vary based on where you are in the world, but globally I think 4.5 is a fair average. I do believe that 4.75 is actually average in the west and 4.25 is average in the east, so you can adjust the curve based off where you are if you intend to use this same curve. Obviously it will not be perfectly accurate, but I tried hard to make an objective curve based off what I've seen in real life. I believe this curve is accurate up until 8.0+, as faces those attractive are simply anomalies.