I agree, I'm not sure if the MCs personality trait stat changes the dialogue but it really doesnt seem to impact the game at all. I thought based on what personality youd get youd end up with one of the girls, but you can just get a harem. I think itd be more interesting if you could get only one or two girls depending on your personality trait. Of course there could still be an option to get all the girls however I think it should be more of a challenge since the game goes full pokemon and basically forces you to "catch 'em all" unless you specifically dont wanna save them.