I write album reviews here, on my blog ("A bit of subjectivism...in metal") and on my RYM profile (bartek_conveyor). I mainly focus on these more extreme bands.
Grading scale:
100% - perfection
95 - 90% - excellent
85 - 80% - very tasty
75 - 70% - good
65 - 60% - so so
55 - 50% - not very well
45 - 40% - close to abomination
35 - 30% - poorly
25 - 20% - tragedy
15 - 10% - worst crap