Oldest that I've played in games: Barricade

Oldest that I've played in blog-only format: The Torn Prince

(he was my first muse on Sages of Chaos back in... '05 or '06)

Old that I've EVER played: a horrible Mary Sue called Charza Quinn

who was a podracing Dug Jedi that was raised by Tuskan Raiders

AND SHE WAS FABULOUS

Newest muse is I think a tossup between Knifehead and The Engineer from A Machine For Pigs.

KH only wins out because I've actually PLAYED him.