This is an interesting thread. I am very interested in the Malinois breed, so I have been doing a lot of research on them lately.
The one Mal I have really spent a lot of time with was a total doll. She was from pretty extreme parents, but for whatever reason she was a super mellow girl - don't get me wrong, she could turn it on in a second, but the rest of the time she was content to chill out, she was very cuddly and affectionate, all in all a lovely dog that really caught my interest.
So I've been searching for breeders that don't have the usual really extreme dogs, and I have found one that sounds really wonderful. Their dogs are still able to work of course, and have titles, but they are all house dogs, bred to be livable, have an off switch, and make good pets. Some litters are more focused on sport dogs and others are more focused on companion dogs. I've talked to MANY owners of pups and they all have only great things to say about their dogs. Obviously they still require a good deal of exercise and stimulation, but it sounds like they are content to relax the rest of the day.
Anyway, we'll see, but so far I'm really loving the sound of these particular dogs and would love to have one at some point.