I don’t have one, but I have known some. They are very bright dogs and enjoy being trained to do various things for you and with you. The Miniatures tend to be more hyper than the full-sized dogs, but either size needs exercise.
They are also active and love to run, but they aren’t quite as bad as the Viszla is about that – my uncle had one of those and he had to take it for a run at least three times a day. Dobies of good stock typically are described as Energetic, watchful, determined, alert, fearless, loyal and obedient, but sometimes a pup will turn out to be shy or have a tendency to snap.
If you get a Dobie you will want to train it to jog with you, or maybe even investigate agility training. They really, really need regular exercise, but with their short coat they don’t need much in the way of grooming.
Personally, I wouldn’t have their ears or tail trimmed as required for the show ring, but some of the rescued dogs have already had that done. If you decide to do it, please let your vet do it, to make it safer for the dog.