Which Lannister do you despise the least?
The American novelist and screenwriter, George R R. Martin, wrote "A Song of Fire and Ice" which is a series of fantasy novels.
Uh yeah. Yep. Geroge certainly has a crazy imagination to have written all those characters. 
I agree. he started the first volume of "A Game of Thrones" in 1991.
Gosh I wasn't even alive yet. And to think he's not even done with the series. But boy I sure do hate Cersei Lannister. I wonder what he has in store for her.
I'm not that familiar with the series but I do know that in the novels she serves as a point of view character.
Cersei is a very complex character. She's in love with her twin brother who fathered all three of her children. Her father was a very powerful man until he was murdered by her other brother Tyrion, who's a dwarf.
I understand the idea of Tyrion came to Martin while writing the novel, "Windhaven" and Tyrion has been called one of the author's finest creations.
I didn't know that, but I did know Martin loves Tyrion. He's witty and funny but also smart and kind. He's not strong or tall so he has to rely on his wits to survive sometimes. 
Yes, Martin has stated the character Tyrion is indeeed his favorite.