I did an extensive study on schizoid personality disorder, much of the characteristics match me, and many absoluelty do not. It's the same with avoidant too, much of it is me & much is not.
I really like this list of covert & overt traits of a schizoid.
Ones that are true with me I put in bold


OVERT:
Compliant; stoic; noncompetitive; self-sufficient; lacking assertiveness; feeling inferior and an outsider in life.

COVERT:
Cynical; inauthentic; depersonalized; alternately feeling empty, robot-like and full of omnipotent, vengeful fantasies; hidden grandiosity.
Hidden grandiosity. I have that, it's something that is not comman with avoidants.
Also the very idea that I may have schizoid characteristics pleases me very much because it effects less that 1% of the general population therefore making me a special case.
Secret narcissism? I also imagine myself having heated arguments with people I know, telling them off, cussing at them & storming off in a fit of rage.

COVERT:
Withdrawn; aloof; have few close friends; impervious to others' emotions; afraid of intimacy.

OVERT:
Exquisitely sensitive; deeply curious about others; hungry for love; envious of others' spontaneity; intensely needy of involvement with others; capable of excitement with carefully selected intimates.
Yeah, yeah, yeah.

COVERT:
Prefer solitary occupational and recreational activities; marginal or eclectically sociable in groups; vulnerable to esoteric movements owing to a strong need to belong; tend to be lazy and indolent.

OVERT:
Lack clarity of goals; weak ethnic affiliation; usually capable of steady work; sometimes quite creative and may make unique and original contributions; capable of passionate endurance in certain spheres of interest.

COVERT:
Asexual, sometimes celibate; free of romantic interests; averse to sexual gossip and innuendo.
Despite the moutain of dirty thoughts in my head, sometimes I act like a prude.

OVERT: Secret vouyeristic and pornographic interests; vulnerable to erotomania; tendency towards compulsive masturbation and perversions.
Compulsive no, but I do harbor secret insatiable sexual desires. (holycrapijustsaidthataloud)

COVERT:
Idiosyncratic moral and political beliefs; tendency towards spiritual, mystical and para-psychological interests.
Yeah! I am almost abnormally passionate about political issue that barely or don't even effect me. I have such deep-rooted passions it amazes me! Sheesh.

OVERT:
Moral unevenness; occasionally strikingly amoral and vulnerable to odd crimes, at other times altruistically self sacrificing.
Pretty much yes.

COVERT:
Absent-minded; engrossed in fantasy; vague and stilted speech; alternations between eloquence and inarticulateness.

OVERT: Autistic thinking; fluctuations between sharp contact with external reality and hyperreflectiveness about the self; autocentric use of language.
Am I hypereflective about myself? Hmmmm, well.... lol.

Anyway, there are many things about a schizoid personality that fit me right to the bone as well as many that don't.
I am extremely passionate & sensitive, I alternate & sometimes have an intense yearing for social contact & relationships while on the other hand I think I am just fucking fine being alone.
Also, avoidants can tend to be dependant while I have a zealous need to be indepedent & do things myself. So much of it contridicts itself, and that may be what a major problem is with me.

I've also noticed things like when they say an avoidant avoids people because fear of riducule & rejection. That is for sure a major fear for me, but I also have a bit of indifference to other people, I may be in a good mood but just feel like being alone.

I feel inept & inferior when I am in a pressing social situation, ugly, fat, awkward.
But it seems that when I'm with people I know more intimately I harbor a secret sense of arrogance toward them. Thinking that I'm smarter, more insightful, more responsible than them.
It makes little sense but I can sometimes be feeling these two things at the same time.


Almost like I'm mixed between avoidant & schizoid. Part of my isolation is about being idependant, proving that I don't need all that touchy-feely stuff that I can do just fine by myself so leave me the hell alone.
My isolation is not just rooted in a fear of rejection, and I shouldn't have to force certain labels or symptoms on me because that's what the diagnosis says.

And I know, I know. Here I am again being a know-it-all diagnosing myself & even feeling proud about the label of personality disorder. But all that aside, I know that I have some sort of disorder & I'm not going to go telling my mom or my therapist that "Guess what? I finally figured it out! I'm an avoidant-schizoid personality mixed type!"

I may seem like a hypochondriac, pointing at the symptoms & saying "Look! Look! I have this!"
I'm not claiming 100% that I have this, just that it seems very likely & well I'm very hyperreflective & like to make lists & such.