Okay, so I'm making this topic because most of you just suck at critiquing. There are a few users who can do it properly, I personally think Makkine is the best person ever to ask for a critique. The reason why is because she can do it properly, and she's very experienced in writing and drawing; therefore you could probably use some of her critiques as a model for your own.
YOU NEVER GIVE A CRITIQUE UNLESS CRITIQUES WERE ASKED FOR.
Before you even start to write a critique, you need to think about who you are critiquing. If it's someone whose very experienced, you are free to point out many things and not have to worry about them becoming defensive. Now if it's someone a bit younger, and not as experienced, they will tend to feel hurt if you point out many things, so you should tone your critique down a bit.
After you've done that, you need to think about yourself. Are you knowledgeable in the subject you're going to critique? Are you experienced?
If you have done those steps you can start your critique. Now I'll write what a proper critique is.
A proper critique does not consist mainly of your opinions, if it does, then it will most likely be extremely biased.
You will point out the persons' strong points first.
Then you address what needs to be improved WITH positive language.
You cannot critique a drawings with your own styles.
You must have studied many styles of art. You can't critique cartoon styled art if you've only studied realism.
You must have studied anatomy at least a little bit.
You don't have to be a great drawer, but if you're new to drawing, you won't have the ability to properly critique art.
You must have studied light sources and shading.
I see so many people trying to critique the shading, but most of the time they are incorrect or again biased as there are MANY styles of shading.
You don't have to be a great writer to critique writing, but you need to be familiar with literary elements and grammar.
When you critique art, you NEVER EVER EVER EVER take their drawing and "fix it," You'll end up using your style and it will either end up being unhelpful, or the artist may feel inclined to start using your style instead of their own.
I'll be adding more to this, but for now I think I've written enough.
I didn't know where to post this 'cause technically it could belong in every single art section...