I have only played in 2 campaigns and usually the traits i wanted to portray have faded after a few sessions and my characters act the same as i do. But there are also some traits and experiences which shape the characters for example both of my characters developed naturally an obsession during the campaigns. My first character found a rock and was 100% convinced that this rock is special and so i always had a motivation to reach new destinations and meet new people to find someone who could help identify my rock. In my second ongoing campaign my character received a curse that he is going insane when he is not drunk. So i always try to get new alcohol and beeing always drunk and having low int gets us in funny situations.
I also think it is kinda a good thing that these traits evolved during gameplay otherwise i think the other players would not be as accepting and also into the joke and roleplay around it
Which places can you recommend in the fediverse?