I quite like Steph Ango's system of rating 1 to 7 so I'm adopting it. (https://stephango.com/vault#rating-system) It is more granular than 1 to 5 and 1 to 10 is too many.

7 — Perfect, must try, life-changing, go out of your way to seek this out
6 — Excellent, worth repeating
5 — Good, don’t go out of your way, but enjoyable
4 — Passable, works in a pinch
3 — Bad, don’t do this if you can
2 — Atrocious, actively avoid, repulsive
1 — Evil, life-changing in a bad way