Go with a condition that you can back up with records. You get 100% for MDD more easy than one for PTSD. I sometimes think that the VA believes they can guide vets towards filing for PTSD knowing this is one of the harder claims to prove. I was already SC for a mental condition when I went for TDIU and the doctor I saw kept repeating PTSD, and I was not claiming PTSD. I eventually got SC'ed for PTSD, but I never actually claimed it. I knew about the stressor and I did not want to have to verify a stressor when I was already SC'ed for a mental condition. I got my TDIU for schizophrenia and all the other conditions were grouped under that one diagnosis. When I filed for a mental condition in 1972 there was no such thing as PTSD, so the VA had to hang some other dianosis around my neck. Once it was SC'ed I stuck with that diagnosis and did not try and reinvent the wheel. I think the VA believes that every vet who files for an emotional disorder is trying to claim PTSD, and that is just not the case.