"Benzadmiral" because not long before I joined, I was driving a battleship gray Mercedes 420SEL. It was like a land version of the battleship "Bismarck," and I told it where to cruise; thus, "Benzadmiral."
(I thought many times of getting a vanity plate. But "Bismarck" properly spelled wouldn't fit. And "Tirpitz," well, I didn't want people here asking me, "Why'd yuh name yore car 'Tar Pits'?")