Giving a voice to voices

I've heard some unique voices lately and I wanted to see how accurately I could write a description of them.

Girl at brunch

Her voice sounded like she thought so fast, the words couldn't keep up. They kept tripping over her front teeth on their way out.

Friend

Her voice has one pitch, the sound one makes when they see a spider and leap onto a chair to get away.

Friend

His voice is deep and slow, like watching water slide slowly from one end of a bottle to another. He takes long pauses then casually continues, using words that have far more gravity than their delivery implies.

Relative

Her voice has a drawl that appears on every third word or so, as if to remind you where she's from and the politeness she's accustomed to.

Friend

His voice is deep and throaty, like an exhale from a long drag on a cigarette.