Aw, great list and thread!
Just from my personal experience
1)My DDB is pleasant, loving, willing to learn yet quite stubborn at times. Good with people/other dogs thus far (however, she is only 6months, so well see how she does has she matures)
2)My sister and her family have a very friendly lab. Great with others dogs and children, however a bit timid and much more cautious than my dogs. Also even at 5yrs old, he has a TON! of energy. My sisters has been waiting for him to mellow out for 3 years, with no such luck haha
3)Finally, I just met a 1.5yr old Newf at our boat dock recently. She was a doll, honestly. Very well mannered, calm, friendly, no leash. As we walked by, her tail was wagging and she couldn't wait to get a little attention from us. I fell in love a little bit.