I'm with Asuka when it comes to the alternate personalities/Deities (Soma's japanese VAs is just so AWESOME), but when it comes to reyvateils, I like Mir/Jaqcli the best because of her joking personality, her background, and looks. Second place for me is a tie between Tyria, Shurelia, and Cocona, with Tyria coming almost neck-and-neck with Mir because of her personality, looks, and voice actor (this is my favorite scene from her even if it's only cosmosphere. http://www.youtube.com/watch?v=EvOypxkhm1s&list=FL9QaW_6uOLOIpC9ylrsL64Q&index=5
Just that "Ikanaide, Kaeranaide" pulls at my heartstrings.) Cocona comes in second in the second rankings due to her appearance and personality, and Shurelia is last in the second rankings for the same reasons. Third place falls to Misha and Finnel because I like both their looks and personalities (in the case of Finnel, I'm a slight S&M fan, but it's mainly because she houses Soma, my most favorite of the earthbound deities.) then rankings thereafter come from Cloche at the top, then Aurica at the bottom.