For me, it would depend on the DQ. These are the DQs in my breed:
Disqualifications
(a) Viciousness.
(b) Excessive shyness.
(c) Any colour or colour combination not allowed in the standard.
(d) Ears hanging (as on a hound).
(e) Tail cropped or stump.
(f) Males under 23 inches (58 cm) or over 27 inches (69 cm) in height. Females under 21 inches (53 cm) or over 25 inches (64 cm) in height.
I would avoid viciousness and shyness like the plague. What a way to ruin the breed even more. As far as colour, I'm focusing on groenendael anyways, so breeding to a terv with a reverse mask (which I personally love btw) isn't really going to screw me over -- I'll likely only have the occasional terv pop up. Can't go too wrong with black lol. Ears hanging -- I know that some dogs can get hematomas (sp) which can cause the ear to drop -- but I don't know if this is genetic or not -- if it wasn't genetic, I would breed to a dog whose ear flopped for this reason, if the dog was everything else I wanted. Same with tails -- I personally know dogs who have had to have their tails removed due to injury. Oversize or undersize -- well, my line is very small, so breeding to an oversize dog is not a big deal for me. I wouldn't breed to an undersize dog unless it's match was a very large dog, which isn't likely as the dogs in my program are small or average sized. Now, I will give or take some exceptions here -- in my breed, temperament should be of top priority, above all else. My co-breeder recently talked to another breeder who was in Belgians for years, and she told her "since changing my line I have gotten better health and drive, but I just don't have the temperament I used to have." The breeder told her "breed pets for a few years. Stop breeding for show. When you start breeding for show again you will have a sound foundation and something to fall back on." Good plan in my opinion. Too many people compromise temperament to get the right looks. Some faults and DQs are so minor or not even genetic -- if you are passing over a dog with a superb temperament that has no tail due to an injury, and instead choosing a dog with a beautiful conformation but a less than perfect temperament, you are being foolish, in my opinion.
I breed for show, I always will breed for show, but temperament should be my number one priority, and it is. I am in a breed where I have very few choices unless I ship or do frozen semen (which is mainly what I'll be doing) -- however, my next litter has to be a close one due to Visa only having a singleton last time. I've studied the dogs I've seen over and over and keep going back to the dog with the gay tail. There is only one dog who I find to have a better temperament than him, but I don't like the temperament of his lines. I've weighed my options -- and I will likely go for the dog with the gay tail. He is shown. He is active in rally-o and obedience. He is low-drive to suit Visa's high drive. AND --- he has a good temperament. Don't get me wrong -- gay tails in Belgians drive me crazy. But a bad temperament in a Belgian is alot worse.