In DnD, there are many ways of approaching character creation. You can make a serious character with a deep background which influences the story and play style... Or you can completely ignore all that and just make a goofy little guy. You will usually get some mixture of both in most DnD groups.
So the first two characters are discussing their serious background and their motivations and then the other two are just like "I am a fancy lil frog nobel." and "I'm a farmer!"
Is that a labradoodle?