I think a boxer sounds like a great fit! One thing to note though, which you probably already know: you can't take them on runs until they are about 18 months old. I'm a runner myself which is one of the reasons I wanted the breed but they grow SO much in that first year and a half it would increase their risk of hip dysplasia. As a breed they aren't big barkers, mine only barks if he gets really excited while playing. And they are pretty clean dogs! Despite the short hair they tend to shed quite a bit but overall it's pretty low maintenance. I have pretty bad allergies though and the hair doesn't seem to bother me. I am allergic to my dogs saliva, but I just wash my hands and arms after play time and I'm fine. He's super easy to keep clean as well, he loves the shower! Whenever he needs a bath he just hops right into the shower with me and he loves it. Loving showers/baths/sprinklers seems to be a common thing with boxers. Oliver also loves the pool, we can't keep him out of it. They are SUCH wonderful dogs though! Our boxer puppy is almost 6 months old and we are already planning on getting a sibling in the fall.