there are too many rating systems

[Lorsss]

classic rating: ranges from 0 to 10, the average is 5, no man on earth reaches 10
weird rating: the average is 4, the rating ranges from 1 to 8 because no man on earth can overcome 8 PSL
statistic rating: the PSL is calculated on the attractivity tier you are in. For exaple if you are in the top 40% tier, you are 6.2 PSL. this rating is not mathematically linear, so models are the only ones who reach 7 PSL; consequently it's impossible to go below 3.5 PSL unless you have deformations or disabilities.

my proposal is rating people with percentages, for example "you are in the top 10% of men in USA"
this rating system ranges from 0 to 100, is linear and impartial

 

[MiroslavBulldosex]

Classic rating following the bell curve (with the minimum being 1 and the maximum being 9) is the best and the most logical rating system.

 

[Vitruvian]

Real rating are an exponential downward starting at 3-5

 

[Deleted member 656]

4 as average and 8 as best is based on standard deviations. We use 4 because after 4 standard deviations the differences become meaningless.