We know what we like, and we quantify it in the rating system below.
0 Corks: Do not drink this wine. Headache and sass gut will result. If it came in a plastic bottle or a box, you got what you paid for, otherwise, you should see the store manager about this.
1 Cork: If you add some sparkling water and/or ice cubes, you might be able to save this one. Don't buy it again though.
2 Corks: Drinkable as-is, but not with much enthusiasm. Not bad enough to put on the blacklist, but certainly not doing itself any favors. Might be good for sangrias or mulled wine or something?
3 Corks: A decent wine. A few nice things to be said about it, and enough complexity to sound a little snooty when saying them. Wouldn't seek it out again especially, but would not be disappointed to see it return to the table.
4 Corks: A good, delicious wine. Won't let you down if you take it to a friend's house.
5 Corks: This is what you've been looking for, drinking all those bottles of wine. Complex, interesting, delicious, laughs at your jokes. One to take home to meet the folks.