Oh, yeah, boxers are the "special" children of the doggie world - my sister breeds and shows boxers, and the running joke is trying to get a boxer to complete the part of a show that requires them to sit, walk, heel, listen, be polite - they really have focus issues. They remind me of some of the 1st grade boys on my school bus - sweet as all getout, but need to be constantly reminded "no, your feet belong on the floor, not on the window" or "climbing under the seat isn't a good idea"...never dull, to be sure!!!!
The lab/boxer mix should be a great one - both breeds are real lovers, with big hearts (not so much the brains, but...

). I have a chocolate lab, and she tends to be a wee bit species-confused. She was raised with cats, and whenever we get a mouse in the house, she is after it with amazing focus. However, the bad side of that is when she decides to run after it and catch it - picture a 90 pound mouser - furniture tends to fly!

Of course, one of the cats is also a wee bit confused - he has been known to chase a football across the yard - never certain what to do with it when he catches up with it!
The animals are a real source of laughter and happiness in our house - wouldn't trade 'em for anything!