Depending on how strong you are, Melees can be a first choice or a last resort. Melee attacks tend to vary a lot reliant on where the melee hits a zombie and what part of your body you are using to attack. Melees are best used in individual fights one-to-one with a zombie. Fighting off hordes by kicking, punching and headbutting may result in other zombies being able to bite you from being so close. Melees are usually more powerful if they have momentum- another reason to stay away from hordes because of the time needed to gain this extra power, in which you can easily get attacked.