Before, I used the same brush for all the make-up I did, because I only had one.
But then I got a set 32 makeup brushes as a Christmas present, and have now realized that it is so much more fun to put on make-up when you have proper brushes to choose from!
And
Here are my favorites! From the left:
-
The brush I use for my lipstick palette.
-
Slanted brush that fits straight lines such as the lower lash line.
-
Small "flat" brush that I put eye shadow on the entire eyelid with, as well as small details such as highlighter in the corner of the eye.
-
A slightly rounder brush that I usually use to get a straight line in the eyeball line.
-
Larger brush that I blur all sharp lines with.
-
Large oblique brush that I use for my blush.
But the whole bag with all the brushes is always faithfully next to me when I put on my make-up, and almost all the brushes have been used at some point!
English 
Swedish 
Spanish