We used to have a Bernese Mountain Dog at a yard I worked at. He was lovely, a bit clumsy, and affectionate. We found out that he did not like being left alone and had great loyalty to those who fed him regularly.
I have many stories I could tell you as he was such a character, but as I am sure you know each dog is different. Some drool, some don't. They could be called clumsy, or simply not realise how big and strong they are.
I would love to own one of these dogs myself, although I think there may be a few things to consider. Due to size and strength they may not be ideal with small children. Plenty of exercise or room to roam is a must. Be prepared for the big welcome scene with a bounding bundle of heavy fluff headed your way. Feeding even mild curry leftovers requires copious amounts of air freshener. Food left unattended for 5 seconds can magically disappear.
:-)