All the JRT I see at the park we go to are great. They're the *only* ones able to keep up w/Pippi (she still outruns them all). But, she's a bigger girl, just over 12 pounds. Also, most (not all) are really handled & trained. I have found them to be really smart! Also, when I used to ride, JRs were the only guys to keep up - too bad I didn't have Pippi then!
Oh, and to clarify: I do not hate any breed. I'm just not overly fond of a few, but mostly just one