busy, Yes I agree with what you are saying in regards to depression. However, you do have to remember that each of us who are depressed have either went through a traumatic event in our lives, have had a bad home life/upbringing, or really just have a chemical in-balance in the brain. To break it down in such a way would be impossible, as everyone of us feels depression and reacts to it in a different way. This is why the psychiatric field has a randomized diagnostic system in determining depression. Most of us do have much of the same symptoms of isolation, crying, irrational anger.
I hope that you continue to find the answers that you are looking for. You are always more than welcome to come here and seek any kind of help or ask questions. We will help in anyway we can.....