When my wife was a preschool teacher, she had to do home visits for kids that were aged birth to three. She would go into people's home and spend quality time with the kids while they were too young for school. Max was a pet in one of these homes. She bonded with him. So when the family needed to give him up, they asked her if she could take him. We had two dogs already so it wasn't that easy to take him in but he bonded with Rex and Cokie just fine. Two people having three dogs is not a very good plan. Dogs should never outnumber the humans in a household. Adding Max to any mix of dogs seemed to have a multiplicative affect because he was always so excitable. He was six at the time.
Like most labs, he was very needy. If there is someone home all day or if you have children, the lab is the perfect dog. Max was all this and then some. He had a thing for carrying things. If you left your shoes around, one of them would disappear on you. He didn't destroy them, he'd just carried them around. When the snow melted, you would always find one of your slippers under the snow. He also had a thing for puddles. No matter how small the puddle or muddy, a centimeter deep, he'd lay in it. If you let him off leash, expect to hose him down when you got home. He greeted me every time I came home, usually carrying something, sometimes something he just pulled from my recycle bin.
He was my pillow, my doorbell, my greeter, my protector, my anti-depressant, my entertainer, my shadow, my travel companion and friend. It will be a while before anything is the same. There is a huge hole to fill.