This is the rating system I use frequently, explained in all it's glory:
1 of out 5
This rating is reserved for thiongs that make me bleed in some way, whether it be physically, mentally, or through my eyes or ears. Prime example:

THE FUCKING CANADIAN TIRE GUY.
2 out of 5
Reserved for such things that have the ability to hold my attention, leaving me unscathed in the process. This would be the most "neutral" rating, being that it neither kills my brain cells, nor gives me great joy. Prime example:

HALF A PUMPKIN.
3 out of 5
These are things that pique my interest, even may pretty cool. I like these things, but I don't love them. Prime Example:

WHATEVER THIS THING IS.
4 out of 5
These things are the best things in the world. Like, you can't possibly cmprehend how amazingly amazing the things in this category are. Prime Example:

DAVID FUCKING BOWIE
5 out of 5
This is reserved for the worst things of all time. Like, seriously, this is where the Holocaust would go if Jewy McJewerpants were to rate it. But wait, 5 sounds like a good score, doesn't it? Wrong. And I'll tell you why: because seriously, you can't think of anything better than Bowie, and he's a four. Therefore, how can you be better than four. You can't unless the French judge cheats. And that's the worst thing ever. Prime Example:

Sorry.
Well, now you know.