These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Camp: It's a movie about a Serial Killer turned mutant killer snowman who gets killed by antifreeze-laced oatmeal, and who kills people while making tons of snowman-related puns. Please try and guess why people call it campy.
Harsher in Hindsight: Christopher Allport, who played Sheriff Sam Tiller, was killed by an avalanche.
Not all are CG. Most of the spawn are actually puppets.
Snowballs bounce harmlessly off extras.
Many (if not all) of Jack's kills in the second film are also combinations of the costume and primitive CGI, particularly the snow anvil. And then there's Jack's snowdiving near the end of the movie.
The first movie has Billy's beheading, where the head we see fly through the air is clearly an unpainted foam dummy's head with a hat on it.
Tearjerker / Narm Charm: At one point in the sequel, one of the killer snowballs is lying on ground, crying and near death. Jack picks it up and actually does his best to comfort it. It dies anyway and a single tear falls out of his eye. The way he utters "Now it's killing time." after that is nothing but pure rage. This moment should have been ridiculous if it wasn't for the voice acting and music.