I base my reviews on enjoyment, uniqueness and influence in that order, it can only be a 10 if all criteria is met to the highest standards.
Some albums I review needs multiple listens, so I'll leave them in under the 'undecided' tag.

search with these tags (to find my favourites):
10/10
9.5/10
9/10
every rank possible all at once
8.5/10
8/10