So officially the ratings are:
10 - Outstanding. Always want to play and expect this will never change.
9 - Excellent game. Always want to play it.
8 - Very good game. I like to play. Probably I’ll suggest it and will never turn down a game.
7 - Good game, usually willing to play.
6 - Ok game, some fun or challenge at least, will play sporadically if in the right mood.
5 - Average game, slightly boring, take it or leave it.
4 - Not so good, it doesn’t get me but could be talked into it on occasion.
3 - Likely won’t play this again although could be convinced. Bad.
2 - Extremely annoying game, won’t play this ever again.
1 - Defies description of a game. You won’t catch me dead playing this. Clearly broken.
but what does that mean in practice?
Anything that’s a 6+ may well stay in my collection long term. Looking at what I have below that, I should probably sell Chez Greek but I doubt anyone would want it; not sure where Kodama Duo has got to; Skull doesn’t grab me the way it does many people, but sometimes I’m in just the right mood for it. Trophy Buck is small and was a demo copy (three, actually), and Zombie Dice… about once a year I want to play it.
And I’m clearly not going to make the better version of Statecraft. Yours for postage.
But a 6 is “I may well be in the right mood quite often”; 6.5 “might well take it to the game group”; 7 “good solid game”; 7.5 “actively like this”; 8 “I am looking for an opportunity to play it”; 8.5 “among my favourites, would instantly replace if it got lost/damaged”; 9 “a long-term favourite”; 9.5-10 “bury me with this game”.
ETA: also of course I have bouts of rating games so it may reflect “how I felt in the first flush of enthusiasm” or “how I felt a year later when I caught up on rating my played-but-unrated games”.