I had a rotty that we got when my daughter was 4. We had to put her down 2 years ago because her hips/arthritis was so bad. She was the best dog!!! She loved kids and wasn't the least bit aggressive. She never barked and other than being a big dog and looking mean, she was a wimp.
She was very well behaved and smart. When I got her I took her out to her "potty spot" and she never had an accident in the house unless she was sick.
I must say for a short haired dog she shed like crazy.
She was great with our cats too