70-100 bias: I only rate albums I finish, and I typically only finish albums I enjoy
<50: I probably didn't even finish the album
50: flawed or uninspired in some ways but not unlistenable
60: I see the vision but the album falls short in either ambition or execution
70: decent to good for an albums genre standards
80: great and/or somewhat innovative for an albums genre standards
90: pushing boundaries and/or excellent execution
100: outstanding concept and/or performance, very subjective