What is your personal review system?

[Riachu]

1.0-1.9/10- avoid at all costs
2.0-2.9/10-terrible
3.0-3.9/10-bad
4.0-4.9/10-poor
5.0-5.9/10-average
6.0-6.9/10-above average
7.0-7.9/10-enjoyable but flawed
8.0-8.9/10-great
9.0-9.4/10-excellent
9.5-9.9/10-outstanding
10/10-virtually flawless