Its hard to come up with 10 for this movie, but I think our standards are much lower than for the OT - we dont want EVERY background character from the PT just yet. That being said, here's 10 that would be cool.
1. Senate Duel Palpatine (this is the only must have on my list)
2. Medical Droid for Padme "She's lost the will to live"
3. Mid-wife droid for padme "Uuumba"
4. Kashykk Clone Trooper (new sculpt)
5. General Gree (new sculpt)
7. Bun-hair Padme
8. Utapau refueler guys
9. Senate Speech Palpatine (red robes)
10. SA Yoda with hooded cloak