I have had Labs most all my life. My last one was 16 years old when he died, great dog.
We decided to get a Jack Russell after he died so we could keep in the house. He is 6-8 years old now and has to be the most fun of any dog I have ever had. Very smart, head strong and easy to train. Does multiple tricks, counts, but very head strong at times. He is not as hyper as some JR's. What impresses me is the number of words he understands. People don't believe some of the stories I tell about him till they come over for a visit and they leave amazed!
I'll try to post a pic later.