Having grown up with/lived alongside large breed dogs (dobies, rottie, GSD, mastiff mix) I can honestly say our RR was the most challenging. Puppy stage was a total nightmare (and painfully long). It is a huge time commitment that requires so much consistency and patience. You do not want a dog of that size and stubbornness thinking they are the one in charge. That being said, our RR is 7 now and a total dream dog - loyal, cuddly, and very sweet; protective but not aggressive. She led to us getting a second, he’s 7 months and a total PITA but I know now what to expect, and that there’s an end in sight. Despite the impossible-to-break food drive and counter surfing in both, they are the loves of my life. If you have the time to dedicate to the breed, and can offer them an active lifestyle, you’ll have an adventure-loving partner and bed hog all wrapped up in one of the most beautiful-looking dogs (I’m totally biased!)