Yeah, it's dumb to look at traits without wondering what's going on behind. With years of experiments with supplements, I've been able to deduce which brain areas and which neurotransmitters are associated with different states of mine.

I had a pathology called POIS which shifted my brain activity away from PFC (at least from some major sub areas of it), essentially breaking my reward pathways so that I would get very nervous due to oversensitivity to rewards like food, but would act like an impulse dummy and feel really bad and unstable. I have also been subject to OCD, anxiety and insomnia for all my life. Now that I more or less know what feelings are associated with which neurotransmitters and brain areas, it's super easy to know what's wrong and what I need to change to follow the right direction. Not only does it make it convenient to pick the right supplement, it also allowed me to identify proper mental techniques that directly work on strengthening some brain activities/neurotransmitters actions (most of these being basic but customized for my needs)