Unless you stick with the same type of weapons throughout the game, you will miss the different kill animations in the game as each weapon only uses one animation. (selectbutton.com)
You can unlock more killers as well as new kill animations that'll be used on your victims. (darkstation.com)
It just seemed like gamers could spend hours at a time creatively killing zombies without getting slightly bored whatsoever, and the resulting kill animations make every minute spent doing so a worthy one. (entertainmentbuddha.com)