I'm not a fan of them, I think they're a colossal waste of time. They're extremely bland and uninteresting as well in this installment, none of them actually stick out to me, and the ones that do are purposely meant to piss off your opponent. Sheeva's applause, JC's trophy, Ermac's stomp, Kabal's head on a stick, Shang's recycled Joker fatality, every other bland fatality that ends with the opponent showcasing the opponent's body part etc. And people wonder why the general attitude online is so horrendous.
No blood, zombie kombat, or just leg sweep/projectile from a far is always what I do.
Also, c'mon guys, the whole "well that's going to tarnish your reputation etc" speech isn't really a concern to anyone when online is so terrible to begin with...I have like 80 disconnects or so just because I hate watching fatalities. I mean, really, all I'm bypassing is being locked into an animation and sparring myself 20 seconds and selecting "No" to a rematch.
All I bought this game for was the actual fighting, not the gimmicks. I'll go dust off my old MK1 and 2 cartridges or consider getting the crappy 3D installments if I want gimmicks!