10 - Not even worth the drain.
20 - Down the drain.
30 - Probably has a nice bottle or label, but still down the drain.
40 - I just don't want to drink this.
50 - I prefer not to drink this.
60 - It's alright, but a little boring.
70 - Good enjoyable whisky.
80 - A darn fine whisky
90 - Give me more!
100- Halleluja whisky.
I also look at price. So expensive whisky's get a penalty if they don't add anything extra over younger and cheaper options.