From what we've seen, Josie has basically no personality. Her image is just random quirky stuff - anime, dance games, obscure music - in place of actually having a strong sense of self. You wouldn't get a decent conversation out of her. Plus the tics and stimming are cute in this context, but would become incredibly irritating immediately in real life.
Meanwhile, Letty has a real personality where you could chat with her for hours. Yes she's desperate to please, but that can be quite alluring, especially in the bedroom where we've seen she's quite the freak. This "people pleaser" personality trait is attractive enough for her to have a stalker who's willing to break the law just to get her attention.
As for the hairy puss, it's already speculated that she grew out it out for her boyfriend's pleasure. Or she just doesn't give a fuck. Either option is a win.