There are two varieties of 73h l337. They are used based on the respect carried towards the person whom you are talking to.
l337 Light is used when you're talking to friends, acquaintances, and family because it is merely casual talk.
Hardcore l337 is when you are talking to a person of higher importance or someone you respect and/or admire greatly. Unlike l337 light, which is an alphanumeric language, hardcore l337 utilizes various other symbols.
h3y d00d. h0wz j00r m4d g4m1ng 5k1llz?
hey dude. How are your great gaming skills?
3><|_|53 |\/|3, 1'|\/| |_00|<1|\|g |=0|2 p|-||23c| 1|\| 7\/\/0-0-|=0|_||2.
Excuse me, I'm looking for Fred in 204.