The Highly Sensitive Person (HSP) DOES model by Elaine Aron, PhD.
Brief overview of Elaine Aron's D.O.E.S. model for describing the experiences of having the Highly Sensitive Trait. I note that about 20% of the population has this trait, so it is not rare. It is also mentioned how High Sensitivity may be an umbrella trait or term that encompasses other states of being, like ADHD, Sensory Processing, Autism, and others.
D - depth of processing
O - overstimulation
E - empathy
S - Sensitivity to Subtleties