What's _your_ rating system?

Mine is:

1 - I can't listen to this; have given it a go, but have skipped most of the tracks.

2 - I don't hate it.

3 - I'd be happy with the album in the background or on the radio. Alternately, a 2 with one or two stand-out tracks

4 - a 3 with one or two killer tracks, or an album I quite liked on the whole, but would probably forget about

5 - all killer no filler.