I have never thought about that before but when you start thinking of it then you see that there are two different things. Personality we see easily, this is how the person presents himself, funny, sociable but to find out the character you have to dig deeper and you will find it sometimes in extreme situation, this is the inner core, reflects attitude and behaviour. Sometimes because of our fast life in busy everyday routine we do not have to explore someone's character, or sometimes we just do not care to do so. Living in smaller community, you learn your neighbourhood better. That just reminded me a nice british serie "Barnaby" when s crime happens in a small idyll village and you learn that almost everyone has "corpse in the cellar"