I just took a class on abnormal psychology this semester, and we talked about personality disorders. In some ways, Schizotypal Personality Disorder seems like Asperger's Syndrome, which I've been diagnosed with as of 2002, though it doesn't involve being preoccupied with the paranormal or thinking I have magical powers.
Asperger's Syndrome criteria include having a desire for sameness or liking routines to stay the same, odd or formal patterns of speech, a tendency to fix one's focus on a particular, and even odd, things or parts of things and talking about it even at inappropriate times (one of my "obsessions" is history and random bits of information about different things), a tendency toward being socially withdrawn, and difficulty reading social cues.
Asperger's Syndrome is one of the Autism Spectrum Disorders and has some similarities with Autism, but not as severe. One of the issues concerning diagnosing people with a particular disorder is the tendency of the different disorders to share some of the criteria, but not others. For this reason, self-diagnosis and diagnosis by parents or teachers can be dangerous and should only be done by a professional after much consideration (and not just 15 minutes and one session, either). Diagnoses can create self- and socially-damaging labels that can stay with a person their entire life if care is not taken in how they are diagnosed and treated, both by the specialist diagnosing them and people outside the medical profession. Generalizations have their uses, but stereotypes can be very dangerous and should be avoided by all.
Autism Spectrum Disorders are not personality disorders, just to avoid any confusion. They are a part of the Pervasive Developmental Disorder family or PDD. PDD also includes Rett Syndrome, Childhood Disintegrative Disorder, and Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS). For more information, go to http://www.autismspeaks.org
. For information on personality disorders and Schizotypal in particular, go to: http://en.wikipedia.org/wiki/Personality_disorder