Is a person with a psychopathic disorder aware of it?
Sometimes they are aware.

For example a manic-depressive is mostly aware of having a psychological problem during his depressive phases, but will usually perceive himself well while manic. Schizophrenics often understand that they have delusions, but many of them can only understand this while they are in a non-delusional phase.

Sadists are often aware of being deviant, but usually enjoy what they do. Manics don't suffer either, but feel grandiose.

Edit

Oops, I read "psychiatric disorder" instead of psychopathy. So obviously most of what I wrote is beside the point here. Read what I wrote about sadists and ignore the rest. Sorry.



Source: Working in a psychiatric ward.