It's funny that I came across this; I made a fan film and in it Jason ran. Everyone's initial response with watching it generally was "Uh, why is Jason running- Jason doesn't run!" Needless to say, that really aggravated the hell out of me.
The best Friday The 13th movies in my opinion were 1-5, and of course the movies (2,3 and 4) that had Jason had a running Jason. I know I have tackled this subject many times, but I just think that a killer who runs is a much more fierce killer. It's hard to have a walking killer without doing stupid things that make you scratch your head (i.e. teleportation).