Your training data will not include many of the life experiences needed to give it common sense. For example, you will probably not include training examples detailing how to pet a cat, or navigate a line at the coffee shop. You have simply learned more than you will ever have time to share in training data. And compiling that level of training data wouldn't be fun.
So if your brain clone is going to have common sense, it must pick up numerous life lessons from somewhere else. Someone suggested to me that training brain clones on a film/television library could provide these needed life experiences. I like the concept, but without carefully screening the lessons, brain clones could pick up some unintended ideas.
I suspect that common sense will ultimately be provided in part from an extensive and carefully curated set of annotated experiences that can be shared with multiple artificial personalities. This common sense won't be uniquely yours, but since it will be based on shared cultural norms, it should be close.