From what I've heard, Weims are on of the most energetic and hyper breeds out there....LOL. Which depending on individual situations, can be either be a good or a bad thing. So if your brother isn't up for lots of walks, exercise and training, a Weim probably isn't a good choice.
I've also heard that they need LOTS of socialization. The breed can be somewhat timid and nervous in new situations. So getting the pup out and about from the start is important. I think that is essential in whatever breed you own, but Weim owners I know have said this breed needs extra attention when it comes to this.
Here is a breed profile that I've been told is pretty darn accurate about Weims. Cross-post.
If you want a dog who...
Is large, sleek-coated, and tautly-muscled, a true athlete bred to hunt all day
Is unusual-looking, with a ghostly gray/silver coat and eerie light eyes
Is packed with energy and thrives on vigorous exercise and athletic activities
In the right hands, is a loyal, aristocratic gentleman of great presence and character
Is watchful with strangers, so makes a keen watchdog
Looks powerful and imposing, so also makes an effective physical deterrent
A Weimaraner may be right for you.
If you don't want to deal with...
Vigorous exercise requirements
Rowdiness and exuberant jumping, especially when young or not exercised enough
"Separation anxiety" (massive destructiveness and barking) when left alone too much
Suspiciousness, aggression, or skittishness toward strangers when not socialized enough
Aggression toward other animals
Strong-willed mind of his own, requiring a confident owner who can take charge
Shedding
Barking
Slowness to housebreak
Health problems
A Weimaraner may not be right for you.
The high-energy Weimaraner, bred to hunt all day, needs an athletic owner who can meet his demanding exercise needs: running, biking, hiking, jogging, field work.
Too much confinement leads to hyperactivity and destructiveness, as does being left alone too much. A bored Weimaraner will bark up a storm, demolish your home and yard, even attempt to escape in search of adventure.
Reserved and protective with strangers, dominant with other dogs, predatory toward small animals such as cats and rabbits, the Weimaraner needs an owner who can provide leadership, socialization, and training beyond the beginner level.
He is headstrong, but in the right hands is capable of learning and doing virtually anything. Indeed, a well-matched owner will find him a loyal, aristocratic gentleman of great presence and character.
A novice with little time and space will find him a rambunctious bully, difficult to control. For more info visit:
http://www.yourpurebredpuppy.com/rev...imaraners.html
Weimaraner 
