I think they both grow into opposite roles, so to speak. In school, Sirius may have been rambunctious, boisterous, charming and extroverted, while Remus was more laid back, soft spoken, studious, trying to be a role model and maybe even a little self deprecating. Remus grows at Hogwarts, having an opportunity to finally be himself and be surrounded by people and friends and a "normal" teenage social life denied to him by his condition in his home with protective parents.
Fast forward to adulthood - Azkaban has destroyed Sirius, the silence would have probably - okay, kind of canonically - driven him insane. He has no one to charm, no one to laugh with or cause mischief with. He's not the popular troublemaking pretty boy anymore. Remus, meanwhile, is accepted back to Hogwarts to teach a new generation and is comfortable with everyone. He's LOVED by everyone, save maybe Snape, who knows his real condition.
Sirius FREAKS OUT with too much overstimulation post Azkaban. I headcanon that Sirius would have a horrible time where he once flourished - in loud groups and in boisterous parties. The anxiety would just put him over the top. He might try to dive headfirst back in it, but it would never really be the same.
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I think they both grow into opposite roles, so to speak. In school, Sirius may have been rambunctious, boisterous, charming and extroverted, while Remus was more laid back, soft spoken, studious, trying to be a role model and maybe even a little self deprecating. Remus grows at Hogwarts, having an opportunity to finally be himself and be surrounded by people and friends and a "normal" teenage social life denied to him by his condition in his home with protective parents.
Fast forward to adulthood - Azkaban has destroyed Sirius, the silence would have probably - okay, kind of canonically - driven him insane. He has no one to charm, no one to laugh with or cause mischief with. He's not the popular troublemaking pretty boy anymore. Remus, meanwhile, is accepted back to Hogwarts to teach a new generation and is comfortable with everyone. He's LOVED by everyone, save maybe Snape, who knows his real condition.
Sirius FREAKS OUT with too much overstimulation post Azkaban. I headcanon that Sirius would have a horrible time where he once flourished - in loud groups and in boisterous parties. The anxiety would just put him over the top. He might try to dive headfirst back in it, but it would never really be the same.
I have to stop rambling. I have to...