My favorite new addition would be Havik or... Yeah, maybe Dairou or Hotaru.

Shujinko or Ashrah. Hotaru has only 2 moves, Dairou doesn't really have great combos, Kobra is a rip-off of Johnny Cage and kinda reminds me of that guy from Dumb and Dumber (forgot his name), Darrius had some potential but they didn't do much with him, Kira's just a combination of two other characters (she had potential if she had some more originality), and Havik looks cool but he's not a great fighter. Shujinko, the whole Konquest idea got me into his character, so I think he's one of the better new characters. Sure, he has moves from other characters, kind of like Shang Tsung in a sense, minus the morphing, but that doesn't stop me from using him. Ashrah, people say she looks like Raiden just cuz of the hat, but she seems like a character that may return in a future MK game. She's not a bad fighter either.

i say darrius, my second is havik

Shujinko, Havik, and Ashrah.
Even though i like them all, they are great editions. We cant have people returning all the time. Then it wouldnt be fun seeing retro characters the next time.

Hotaru
Ashrah
Havik