Often sarcastic, and I watch anime for entertainment. The way I rate anime is how well it keeps my attention. So my scoring might be a bit high.
My Scale out of 5
5 - Must Watch , worth your time
4 - Pretty Decent , If you got the time definetly take a look at it.
3 - Watch it only if you got time to kill.
Anything less - Spend that time searching for other anime.