And I feel like you could be a lovely meek person and have a wild ass dog because you dont know how to train it.

Yeah, one of ours, a corgi, has been been on the war path since she was six weeks old. She's great with other dogs that she knows, and fantastic with kids. Otherwise, any new stimulus might as well have emerged through the floor, straight from the bowels of hell, and nobody can sense it but her. She's on constant guard duty, warning off would-be invaders and giving instructions to fellow defenders. This conflict between the forces of good and evil has raged on for a little over four years from her perspective. War is hell, and apparently she loves every minute of it.

"Eugenics for all." (boooo!)
"Very well, Eugenics for no one." (booo!)
...
"Eugenics for animals, manifest destiny for humans." (yaaay!)

Yes. And terriers are little bastards.

Absolutely. Early socialization is also a huge factor. And no matter the breed, they all have distinct personalities.