As for drive, they tend to be very similar to other RTs. They can be a bit more aloof and I have found a more serious attribute to them. They are still as obsessively devoted to their owners. To this day Hannah doesn't light up with anyone like she does with me, which is depressing sometimes but she's healthier where she is now.
Hannah was a ball player but never obsessive. She was great in agility but extremely sticky, she hated distance. When presented with a fight she was in for the kill, Shamoo my white/black pit bull has a funky ear from Hannah mutilating it in a fight (another stellar reason it's safer they are apart). She's also gone under the water, almost drown, and continued fighting my friends corgi mix. Hannah was tested on hogs but was seen as "too careless".
Her sister, Terra, was much more level and cocky and social. I think she went on to work hogs after she was returned (the two tried to kill one another as pups).
Basically, tough little dogs, driven but not obsessive. Intensely devoted but not needy and SA suffering. Smart dogs, not hard to convince to work with you but rarely silly dogs.