Here we can list even more than 20 characteristics as far as we do not get bored on the third. We can include everything we can think about.
As every single exercise we will not be judgmental to ourselves. Don't be critical and hard on yourself even for the things that you find yourself writing down but you do not like. Just let go and write everything that you feel that is right for you.
Once you are ready read again your list. Pay close attention the the proportion between the included personal characteristics and social roles.
When we are involved in process of working over ourselves it is always beneficial to go through this exercise. Here we can extract additional information above what we already know about ourselves.