At age 12 I got my first purebred dog, it was a female Irish terrier. From show lines, she was not considered a promising show dog.
She was absolutely fearless and a great watchdog.
She was as loyal and faithful as anyone could ever wish. She was a great family dog. She liked the entire family and really didn't play favorites. She was still a "hard charger" though. She played "full out" all the time.
We bred her one time and kept a pup out of that. Her daughter shared all of these traits but was a bit "softer" and more loving.
My only caveat would be that, like all terriers, they have boundless energy. You'd better have some plan for enough daily exercise outside to wear the dog down a bit. Otherwise, you're going to think an atomic tennis ball is bouncing around your home.
Mind you, this was about 40 years ago now.

Dang, I'm getting old.