My rating system is on a scale of one to five. Here's how it goes.
5/5: Excellent, every song ranges from good to outstanding.
4/5: Good. A few stinkers, but mostly solid.
3/5: OK. Some songs are good, some are bad.
2/5: Mediocre. Most songs are poor, but a few diamonds in the rough.
1/5: Bad: Every song is mediocre to abysmal.
When reviewing an album, I will mostly just take into account the quality of the melodies. I don't really mind bad lyrics in a song.
I also don't give a damn about if an album is "influential" or "Legendary" or whatever. I only pay attention to how good the songs are.
I will review music by band, not by album.