Noob's, Sub-Zero's, Ermac's, Sindel's, Cyrax's, Kitana's, Johnny Cage's, Raiden's, Sonya's, Stryker's, Shang Tsung's, Smoke's and Kano's endings are my favorites.
I would like Kabal's ending, but it implies that he reverts back to being evil again, which I do NOT want at all. Kabal must stay good, IMO.
i like Mileena's the most because she actually became smart and killed Shang .
Also Kitana's ending . Her Jade and Mileena , the 3 deadly females will forever protect Edenia
Ermac doesn't really have to mean HE beat Shao Khan, just that he was defeated.
Same thing with Sonya.
Johnny's may be a little tricky though, and I am pretty sure they don't really kill any other characters.