What do you like to see on a review.

Hey everyone!

So I have some products that I would like to do a review on, because for some of them you guys asked for it :)

But the thing is that I do not have much experience on doing reviews. 

So I want to ask you, what do you like to see on a review makeup related?

Do you like swatches?

Do you want to know about the formula?

The staying power?

What else?

And about makeup brushes? What do you want to know about a brush?

...

Please tell me, so I can do the best I can. And help you the most I can :)