Yup, chose "Tarquin" as my Legacy. Was a reference to the old kings of Rome, I only later realized you could read it as "Tarkin". True story.
Anyway, BioWare promised Legacy levels would get you access to new customizable options in character creation, special skills and the option to tie your characters by way of a family tree. I wouldn't mind more, but at its core, it does seem a nice feature. Can't wait to see how it turns out myself, either.