5-Star Method: 3/5. 5 usually isn't enough specificity, and half-stars feel shoe-horned in. At that point just used the 10-point system.
1-10 Scale: 8.5/10. This is a classic, and allows for much more flexibility, however unofficial. A 0/10 simply has more impact here, however, the space from 3 to 6 seems kind of wasted, as people usually use 7 as an average rather than 5. Halves feel less shoehorned in.
Percentage: 96%. Like the 1-10 scale, but 10x more. This scale has enough specificity for any casual rater. Sadly underutilized in the modern era.
Floating Point Number "Amy's Method": 1. The maximum possible flexibilty allowed within a single number. Easy to convert to other systems, easy to interpret, and gets you any level of specificity.
US letter grades: B+. Recognizable to any USAmerican, and has an aura of professionalism to it. Feels less continuous and more subdivided. More situational, but it has its merits.
Mohs Hardness Scale: 5 (Apatite). Unsure exactly what this would be used for in contrast to the 1-10 scale, but same basic function.
Rhythm Heaven Rating System: Just OK. Functional, but nowhere near enough specificity.
Pass/Fail: Fail. A binary option is never going to be what I want.
Mr. Jones' Secret Method: Aughta' last you a week.
