Some dogs may attack or try to dominate other dogs even if they're love-bugs with people; others would rather play than fight; and some will turn tail and run.
Breed isn't the only factor; dogs who lived with their littermates and mother until at least 6 to 8 weeks of age, and who spent lots of time playing with other dogs during puppyhood, are more likely to have good canine social skills.
Dogs from any breed can be good with children based on their past experiences, training on how to get along with kids, and personality.
No matter what the breed or breed type, all dogs have strong jaws, sharp pointy teeth, and may bite in stressful circumstances.
Contrary to popular belief, small size doesn't necessarily an apartment dog make — plenty of small dogs are too high-energy and yappy for life in a high-rise.