Oh man, berger blanc suisse are beautiful dogs. From what I know, like your pup, berger blanc suisse lines and temperaments are just much more mellow and "friendly", relatively washed out working drive and protective aggression (if any at all). Despite being considered GSD in the past, they're really a very different breed now compared to GSD working lines.
You don't have to worry about a dog turning into a robot due to a sport though. Bitework won't essentially change a dog's genetic temperament and drive (unless done unethically). That robot dog probably originally had a dead-serious and focused temperament when it comes to his work, whether or not he acts goofy off the field, which is why he is successful in the sport.
If you're looking for a formal activity to actively work with your pup, there are a bunch of very rewarding "well-trained/obedient" show-type sports to do other than bitework. You guys can definitely look into rally obedience, agility, and disc. You might also be interested in herding or nosework too.
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