I have a lot of fond memories of Mortal Kombat, and like NBA Jam, those memories were a bit kinder than the realities - especially when pitted against having played the recent modern counterpart. The graphics actually hold up okay, as do the sound effects and music, but the controls killed me - often literally. I used to be fairly good at these games, but it took me quite a while to get the hang of playing again with favorites of mine (like Scorpion), and some systems were better than others.
I made a quick video montage of the versions we had laying about:
Mortal Kombat 1 for the SNES
Mortal Kombat 2 and 3 for the Sega Genesis
Mortal Kombat Trilogies, 4, and Mythologies for the N64
Of them all, 3 and Trilogies aged the best I think. 4 was very 3-D heavy and felt off to me, and Mythologies was more of a side-scrolling adventure game. I will admit though, it was fun using Scorpion to use the fire-breathing skull fatality on Sub Zero in MK1 (that's on video). One thing I found interesting were the range of settings for things like blood, and also the button configurations. The genesis pad wasn't too bad, but I found the N64 controller a bit awkward for fighting games. Anyway, it was a fun stroll down memory lane, and you can definitely see their influences on the new release, which I am still playing and thoroughly enjoying.