WilliamKendall
Chieftain
1. Zulu
2. Sumeria
3. Hittites
4. Ethiopia
5. Austria
6. Assyria
7. Sioux
8. Poland
9. Hungary
10. Brazil
11. Khmer
12. Mali
13. Phoenicia
There are literally dozens of good recommendations for new civilizations in this thread, including Androrc's above list, nearly all of which would make for fun and exciting new games. However, I strongly suggest that any further expansions or downloadable content to CIV5 should consider one or more relatively new entities and do so for regions of the world with significant territorial coverage gaps. In prior posts I’ve separately mentioned most of my preferred civilizations, but decided it might be helpful for the discussion to assemble the following combined wish list organized by region:
(1) North America: Anasazi (Ancient Pueblo), or Mississippian
(2) South America: Brazil
(3) Europe: Austrian Empire, or Austro-Hungarian Empire, or Minoan
(4) Africa: South Africa, or Zulu
(5) Middle East: Israel (modern state), or Israel (ancient state)
(6) Asia: Indus River Civilization (Harappan)
(7) Oceania: Australia, or Indonesia