in my experience, a dog tends to take after it's owner in a number of different ways - this is especially true if you raise them from puppies. often time i catch myself making fun of my dog for some weird idiosyncrasy of his and realize... i do something really similar!
he's also teaches me about patience on a daily basis: i have to be very vigilant with him when we're out because he's incredibly sweet to people but extremely cautious around dogs he doesn't know.
acceptance is another learning, and I know that facet will be greatly tested when his time comes. but he is my best buddy and i am incredibly grateful for all the time I have had with him so far (he will be 3 at the end of the month!!)