When do you choose to rate anime?

[Blackangel]

if you are into rating anime, when would you choose to rate that anime?
after completing it or after looking at something good in that anime

 

[Grungie]

Unless it’s ridiculously long, I’d say it’d make sense when you finish it.

 

[Rinko]

I don't pretty much care about it
If I feel like something is very well done or if it is not at all good, then I would say that it deserves something