The Wilhelm Scream
The Howie Scream
I hate both of these canned special effects, and wish they would just record an original death scream if the movie needs it, or at least use a less obvious one. But between the two of them, the Wilhelm scream definitely breaks the mood of a movie for me. I can't help but hear it, and can't help but think of some of the other times it has been used. Which completely pulls me out of the movie. I know it has become kind of a right of passage for sound editors and an inside joke of sorts to find just where in a movie it is (it's in like 75% of action movies it seems).
So for others who hate it as much as I do, vote for whichever you hate less, and if you like them vote for which you like more. Maybe we can decide once and for all, right here on KFFL the ultimate canned special effects death scream