I have a BSH 16 week old kitten bred by my daughter and he's absolutely lovely. He licks like a dog and follows you around like a dog. He'll play games with you and loves to lay on his back and have his tummy rubbed while he's licking you...probably the most loving cat you could ever wish for! He just loves his ears and toes stroked when he's about to fall asleep.
He was fully litter trained by 8 weeks old and we've never had a problem with him that way whatsoever or any other part of his behaviour. He is exclusively a house cat and now even travels with us to our caravan and loves it. Probably the only downside to him if you can call it that is he won't leave our side and is forever wanting to play which believe it or not can be demanding at times but I can live with that!
I would say he's the perfect breed for a house cat and his temperament is superb and he's never once shown any aggression whatsoever.
The advice I would give as a new kitten owner myself is don't rush into picking the first one you find, you have to look beyond the cuteness and observe the cat and its behaviour and you may have to look at several before you find the one which is right for you!
I was very fortunate in that my daughter gave me the pick of the litter and we made several visits to observe all the kittens in the litter before my OH and I chose him and he turned to be perfect for us! If possible try to observe them at least more than once before making your final decision as to the particular characteristics you prefer. All kittens are cute and adorable but they grow into cats and they could be with you for 20 years so it's better that you choose wisely.
From past experience, I found found for instance if they don't like being picked up as kittens, there's a fair chance they will not like that as adults which could be restrictive if you want an affectionate cat. Some of Jasper's siblings clearly didn't warm to being handled to some degree and a couple even showed slight disapproval at that young age which was something for us to consider but Jasper was the exception and together with his general affectionate disposition, he stood out from the rest.
Good luck with your choice.