As with anything else, you only get out of it what you put into it. My future son-in-law was home schooled. He's fine. Normal guy. I've met many others that have been home schooled. Great folks. My wife works with a guy who's wife home schools their 4 kids. Wonderful kids. Super smart, caring, polite, outgoing... the kind of kids most people would want their kids to turn out like. A+!! To note, however, she is a professional teacher. She knows what she's doing. So was my mom. She taught us at home more than most get at school.
With that said, I also had to deal with a large cult-like group of home schooler families (about 50-60 families) that was quite eye opening. Without going into detail due to religion and politics, they were the most self-centered group of parents raising the most awkwardly introverted unsocialized children one could imagine. Borderline feral kids. Pretty creepy.
So, that's that.