I have a Parson myself. His name is Jay and he is 4 years old.
In September (2011) we earned our first diploma for training (AA, beginning obedience).
We live in Holland in a small Harbor town.
Jay loves playing fetch and is very persistent by not giving away the ball or stick that easy.
What amazed me the most is that on lots of websites they say that a Parson Russell Terrier should not be left with cats or other dogs. This is absolutely not true! During work days he's left with my three cats and they do fine. One of my cats is sometimes chased for a few meters but that's all. He has never harmed them.
The first 1,5 year of his live I kept him in an bench because he liked to chew a lot. After that period I tested how he would manage home alone and out of his bench. He never destroyed anything in my household. He does not do a number one or two in the house. When I come home I take him for a walk straight away.
He's also very good with small children. And he likes to cuddle.
Although this is my first dog I have trained him well and he fits perfect with my character and my energy level. He's energetic when I am and can also be a calm dog, laying with me on the couch or on my lap.