Puggles have an estranged sense of self. One minute they are a tiny lap dog that wants to cuddle and be carried around like a baby. Other times they think they are tough Boxers that can play-fight with the other 70+ lb. dogs. I have noticed that the change can be instant, which is kind of hilarious. My Puggles usually eggs on the biggest dogs at the dog park and then comes running for safety on my lap.
Some dog parks have two areas, side for small dogs, usually 25 lbs. and under and an area for large dogs 25+ lbs. I have always taken Puggles to the large dog side, even though he is only 21 lbs. He plays rougher than most small dogs, and always chooses to play with a dog much bigger than he is.
While walking on the street, Puggles usually acts like a large dog. If he hears/sees a garbage truck, motocycle, or bicycle rider he aggressively tries to run after them. I honestly am not sure what Puggles would do once he caught up to them if I let him.
So, in the case of puggles, they are definitely both lap-dogs and large dogs all in one!