Dad's parents were tea drinkers. Never drank coffee. Dad didn't drink coffee, either, just iced tea (and occasionally hot tea).
Mom's parents were HUGE coffee drinkers. Grandpa was a railroader, so he was able to drink just about anything claiming to be coffee. But, it was from drinking Grandpa's coffee that I developed a taste for Maxwell House & 8'oclock brands. Still like them both.
When I was growing up I didn't like coffee. Mom drank instant. Between the stuff that Grandpa brewed (it was REALLY strong, as in rust removing AND metal removing strong) and Mom's instant, I didn't like coffee.
I went away to college and I think sophomore or junior year I discovered that the coffee urns at school put out some really good coffee. So I started drinking coffee, and quickly got hooked. Also finally got Mom into drinking brewed coffee. She'd still occasionally drink instant, but for the most part, she stuck with brewed coffee for the rest of her life.