Of course, it is necessary to describe your personal qualities. It is unlikely that someone will read a long list of your virtues. Be sure and specify the purpose of your making new relationships.
If you are looking for new friends, this simple action will save you from letters from those who seek a soul mate.
As such, it is important to employ a rigorous amount of common sense without becoming too cynical.
Of course you will need to add good photos, at least a few!