Worst: Sonya. Just awful. One of the worst

Best: Sub-Zero. One of them anyway

Best

Scorpion- I was really surprised and delighted that they actually included the "who's next" fatality. Did it accidentally on Takeda when I saw it for the first time. Those darn easy fatalities! Both of his are my absolute favorites.

Goro- both are just brutal

Jax- also brutal for both

Kenshi- pretty epic for the first and the second is weird in a good way

Ermac- I really like both. Very well done even though him and Goro have a similar one.

Raiden- love both. He really didn't need to explode the head in the first one though let alone pop it off.

Kung Lao- question is which of his fatalities in existence ever sucked?

Kano- Two brutally awesome full of personality fatalities.


Worst

Reptile- sadly I'll have to agree the clean split of the head in the first one could have been it, but instead it was executed terribly. His second is ultimately forgetable and doesn't make any sense. (The remaining arm)

Liu Kang- I just expected so much more. Both are mediocre at best.

Johnny Cage- idk once you get past the "here's Johnny!" Line the fatality itself is weak. Still full of personality but weak. His second attempts to be brutal but tries painfully hard and fails in the end imo

Kung Jin- both are cool I guess but just meh

Fulgore- oops wrong game

I guess the rest of them are just right in the middle for me.

Top 3:
Ermac
Ferra/Torr
Kenshi

Bottom 3:
Jaqui
Raiden
Erron Black

Best:

Mileena - holy crap, gruesome. I think even George Romero would cringe at her second fatality.

Sub-Zero - I love the spike bed one...sorta makes up for the lack of stage fatalities...and his primary is brutal.

Ermac - ugh...sick. Both of them. If a fatality actually causes a gag-relfex for me, you know it's fucking sick. Telekintically pulling all your guts out through your mouth...i'm gagging just thinking about it. One of the most extreme they've ever done, and a landmark for violence in the series.


Worst:

Sonya - they're boring

Jax - same...just overall very boring.

Reptile - they're both very "ho-hum" fatalities.

Erron Black - again, boring.

Erron Black's second fatality is pretty basic but it fits the character.

The first one could have been great if it was just the sand bomb exploding through every hole. It makes no sense how sand just keeps pumping out until the guy is almost covered. There's absolutely no logicial reason why this happens.

Worst:
Sonya - very disappointing. Did they really need to use the drone for both?

Kotal Kahn - both rather unimpressive. First one suits the character, second one is just stupid.

Jacqui - both a bit bland. First one could have been better with more detail or if it was a little slower.

Jax- that head split looks SO awful, and I can't even remember the second one so that isn't saying much.

Best:
Mileena - gruesome and fitting for the character.

Kenshi - great use of his abilities.

Cassie - some find them silly, I find them hilarious - suits her perfectly.

The Best : Mileena OWNS this game with her flawless fatalities !
The Worst : Reptile/Jacqui/Jax/Erron Black Their fatalities are quite boring and lame unfortunately.

After seeing Jason's fatalities...he's up there along with Reptile. jesus man,the first one is a blatant ripoff of KK's brutality(the sawed off one) and the second one,he really should have used a sleeping bag for the fatality,and the swinging of the opponent should have been far more brutal and quicker. as it stands,it's a copy of Hotaru's fatality from MKD(the one where he slams the opponent several times and then they explode,and seriously,even that fatality is MUCH better than this one)
So yeah,Reptile and Jason have the worst set of fatalities IMO. Black,Kitana and Jacqui are runners up.

Jason's first fatality is awesome because of the style. Jason's trademark music, the horror movie sounds, the opponent being scared, the camera on Jason while he hacks away. The end result is the same as Kotal Kahn's brutality, but it doesn't really matter. Tons of brutalities and fatalities end the same way.

His second one I don't get. Is it from a movie? The arms rip off for no particular reason.

I played through klassic tower with everyone to get their endings and did both their fatalities during the tower runs, and the only 2 fatalities that stood out to me as just being absolutley awfully terrible were Sonya's. She doesnt even do anything really its all drone, not cool NRS, not cool, especially when she has so much fatality potential, and what we get is the worst things they could possibly think of

yeah,it's the sleeping bag kill from Jason X(and I think either 8 or 7,not sure about that one,though)
honestly,there was a kill where he crushed his opponent's head in,but,thing is,Kano already has that: it's the Terminate brutality.
i'll admit the 1st one has some nice touches to it,but it's still lacking,honestly.