2.0 bad - I have no intention of checking these albums out again.
3.0 average - Didn't impress me, but I may give it another chance in the future.
3.5 good - Interesting enough for frequent listening.
4.0 great - Very solid, impressive releases.
4.5 wonderful - Quite close to the highest tier.
5.0 perfect - Personal favourites. I love almost every single minute of these.

I hardly spend my time listening to bad albums and I spend even less time wondering, how bad they are. That's why I have no use for some ratings.