Fosters probably arenāt the best example because theyāve been taught bad habits most likely. But thatās understandable, dogs arenāt for everyone.
But I really honestly think a lot of it comes down to training and how they are raised.
For example, Gator, for as much as I loved him, was a bit of a terror. Soooo needy and attention seeking, allowed to do whatever he wanted by my dad, barked constantly (my dad thought āheās just doing his job

), etc.
I tried to train him and he listened to me mostly so he wasnāt totally untrained but my dad undid everything. If he alone had raised him, I have no doubt he would have been uncontrollable and dangerous.
Meanwhile, DB & SILās dogs are all rescues and all perfect angels. Theyāve had their challenges and dog adolescence, sure, but they are almost too strict with them sometimes but theyāre perfect for it. Never bark. They would if they were allowed but they have never allowed it and they know it. And also because they have multiple dogs, they keep each other occupied and are not needy. They like attention and affection, sure, and will take it when you offer it, but if you ignore them, theyāll just go lay down somewhere. They are not in your face or obnoxious at all.
My friend has two Goldens that are constantly underfoot and in your face or jumping up, begging, barking, pulling, etc. sweet dogs but totally untrained.
So I think how theyāre raised factors into it. And of course just breed personality. Some are bred to be needy and cuddly or energetic lol
See!? Not all dogs are bad.

Most I think would eat birds lol