I already mentioned one of my least favorites in the other thread. The other dog I try to avoid (though it is extremely difficult) is Canto Wienerau. He brought flash for the show ring, but also very weak nerves, Hemophilia A, looseness in the hocks and a tendency to roach over the loin.
There are others that I don't care for, but to avoid controversy I think I will keep them to myself.
I am found of the Lierbergs and their type though they are not always as easily "touched" as some of the more modern dogs and thus harder to work in protection. I like the hardness of the Körbelbachs and one of my favorites was Arek Stoffelblick. His mother went back on Matsch Bungalow who brought aggression, strong nerves and fight. Belschik Eicken-Bruche's (sire of my Vala) dam was linebred on Matsch (and was a Arek daughter). Belschik was a very strong, intense dog, not easy to handle, but very clear. He also brought longevity as did his sire Troll bösen Nachbarschaft.
I also have owned some great dogs going back on Greif Lahntal. Super obedience dogs. The granddaughter had fantastic nerves, not a crazy drive dog like most people want now, but her work ethics were unmatched. I also had a female that was linebred 4,4-4 on Greif and again the same great nerves, super tracking, though she was a bit crazier in drive (she was also a Mink granddaughter. Mink goes back on Greif). I think, like Fero, Greif had to be bred the right way, always paying attention to balance to maintain the good nerves.
Despite his being about as ugly as a mule, I have really enjoyed my dogs that went back on Mink (I have owned quite a few over the years). Again, strong nerves, aggression and fight along with tremendous grips. My dogs going back on Mink have also been great obedience dogs with excellent hunt drive. Of course they also were combined with other lines.
Another dog that I liked, but don't see very often because of his hip ratings is Grischa Schwarzen Milan. One, the dog was gorgeous, but something I saw in his direct kids and grandkids was heart. These dogs never quit.
Two more lines that I finally was able to cross into are the Fasanerie and Wolfendobel lines. I have liked the Fasanerie dogs that I have seen over the years. Again, strong dogs, excellent fight, aggression, nerves.
One more dog that I also liked, or at least what he produced was Fado Karthago. I had a granddaughter for a short time years ago and at this point own several dogs that go back on him or are linebred on him. I didn't really think about the similarities until I saw how Deja reacted when my rooster attacked her the other day. There is an intensity in the dogs and tremendous fight drive. They also don't take any BS (yes, the rooster still lives).