We have an 8 1/2 month old male, neutered Boxer puppy. He will bark and growl at me if he wants to play or is getting antsy from being bored.
Otherwise, if Otis is barking, it's because there is someone at the door, someone is outside, something is going on that is out of the norm, my neighbor's dog is outside, the kids on the next street over are playing in their yard, or the dog a couple of houses up is outside and barking at him, etc.
Basically, he will bark to let us know that something is up that is not normal. I think as the temperature warms up and the kids and neighbors are outside more, it will be more normal for him and he won't bark as much...I hope. Usually, Otis is pretty quiet.
My kids are 7 1/2 and 11 years old and they all play really well together. Otis is great when all the cousins gather at our house to play (ages 5 - 14). He just loves those days!!! But even with all the kids there playing with him, he didn't make one sound except for his play growl and woo-woo (Chewbacca) songs.
Good Luck!