Bailey's Newfoundland
In general, here is list of some very positive qualities from my expereince as a Newf mom:
1. They learn very quickly and love to please!
2. They like to learn new things- especially the things that they are naturally born to do (ie. water rescue, protecting kids)
3. They don't like to be away from the family and are protective, even though you'd never guess so. I found that out by accident. If Bailey & I are home  alone and he feels their is something odd outside, no matter how slight, she will posture, pace back & forth, then come site by me until he is sure that I am safe. She also postures when we are walking and  she is not sure of the person approaching us. When she is sure they are no threat  she returns  to her normal position and is a happy-go-lucky dog with the tail wagging and all.
4.  They have very strong emotions- almost human like. They will talk for hours with you and if sad will give you the guiltiest face ever!
5. They will love you like no other. They'll give you hugs & kisses  all the time.
6. They will share everything with other dogs like toys, food, etc.
6. They are so loyal to their parents & family that they miss you terribly when you are gone.

Here are some negative qualities:
1. Lots of shedding, drool and messiness in the house.
2. Some aren't protective until they have to be.
3. Intact males take a little more effort to train than neutered males.
4. They do need a reasonable amount of exercise to keep fit.
5. If allowed to stay on the bed/couch the springs can be weakened significantly due to the weight.