I quite like iron.
I like the redness of blood, and the orangeness of rust.
I like that it forms complexes, that it is involved in electron transport in mitochondria; and is used in catalysts.
That is magnetic.
And that it is pretty much everywhere.
I like the idea of "pig iron".
I have a happy memory of saying to my daughter every morning: "F is for Ferrous Fumarate".
Carbon comes second. Because I like drawing hexagons. And organic chemistry gave me the chance to draw quite a lot of these.