Out of the 3 Dark Souls games(Haven't played Demon's or Bloodbourne) I had the most trouble with 2, but that came down mostly to stuff like the weird hitboxes on the smelter demon's sword and how in a lot of cases they substitute challenging enemies with just throwing a ton of them at you at once. While not a bad game it was very much my least favorite of the series.
Anyway, finally picked up Mortal Kombat X and played through the story mode. I think MK 2011's story mode was better but I still enjoyed this one for the most part. Playing though the arcade mode equivalent now with all the characters, some early favorites for me are Sub Zero (Cyromancer variation) and Kenshi (Balanced variation).