i am at endgame and i have never parried once successfully either in pve or pvp
just can't be bothered to figure out how
i know it's useful, i see my 11 year old bro do it whenever he plays
just not something i got a hang of, and it hasn't really hindered me much
edit: k im starting to clean up life before heading into ng+
anyway this was hilarious
http://www.youtube.com/watch?v=ATvBYudDmY4