I may be a bit influenced by Robert Graves' famous novels about him, but I've always rather admired Claudius Caesar - simply staying alive through the reign of mad Caligula was an accomplishment, and despite coming to the throne in an unorthodox fashion, he managed to restore some measure of order and dignity to public life. I'm still not sure what possessed him to make Nero his heir, though.
I am currently writing a book that is set during his reign and the early years of Nero. It's challenging trying to bring ancient Rome back to life in a way that is (hopefully) true to reality but still relevant to a modern audience.
My second novel was set during the reigns of Tiberius and Augustus, but it centers around the character of Pontius Pilate. It's due out May 19.