There is no perfect pillow type. It depends on personal preferences, sleeping position, and body weight.
Most quality pillows include foam, latex, and down/feathers. Each has a different feel.
Memory Foam: Available in shredded foam or a solid insert. Memory foam molds to the head and gives good support.
Latex: Natural latex is hypoallergenic and non-toxic. It has a responsive feel and is usually firmer than foam.
Down: Down has a fluffy feel that conforms to the head and neck. It is best for people who like to fluff-up their pillows.