My least favorite character so far has been Taravangian with the things he has done in the name of his kingdom. My favorite moment was probably either the end of Mistborn (the book, not the series) or when
at the end of Words of Radiance. My favorite Cosmere plant is probably rockbuds because I find them so funny to think about, though the grass from Shinovar is a good one too due to people's reactions to seeing it.