It's kinda strange - with action figures, I've been mostly focusing on OT the past year. But with Sideshow's stuff, I'm most excited about prequel trilogy, especially the Jedi (and the Sith for them to battle).
So once I've got Plo Koon, I'm hoping for Saesee Tiin, Aayla Secura, Shaak Ti, Ki-Adi Mundi (and Palpatine and Dooku for them to battle).