Board Thread:General Discussion/@comment-4504826-20160426040035/@comment-28160457-20160507224924

Probably the fact that genocide is no fun. Many people playing genocide might find Undyne and Sans thrilling to play, as they are the only bosses that don't have their fight ended before it even begins. Almost all of the puzzles are solved already as well. The very fact that the themes of the locations and empty fights are versions of music in the game slowed down by around 666%, and that you have to sweat your tutu off to just complete the genocide route, is the equivalent of the game telling you: "Reset! You're a monster!" Sans's "death" is one of the saddest things I've ever seen (Papyrus fight/death unincluded) in my life. Then, Chara erases the world, and you, the murderer, must get it back. Wait, let me rephrase that: You could get it back if you want, and even then, only by "selling your soul to the devil" can you retrieve it. This is only PART of why I hate the genocide run.

P.S. I never did it myself.