I don't have any very positive experiences with medication related to schizoid personality, only two very bad ones. Citalopram made me turn inwards completely, I shared nothing anymore, I felt nothing, nothing outside of me mattered anymore and I felt empty and locked in. Haldol made me unstable, I had energetic moments where I had to keep moving, panic moments, confusion, though I in general didn't feel too bad. But I'd rather be schizoid than unstable.
Abilify seems fine, hasn't done much about the schizoid traits but I'm on a very low dose. The tinnitus (constant multiple ringing tones in both ears) is getting worse though, that worries me.

What exactly are such medications as you're taking supposed to change for schizoids? The anhedonia? Make you interested in things again, emotional, happy? Don't you have bad side effects from all that?