We discussed this in my guild earlier, and I really enjoyed making a few.
Haikus (experts on haiku, bear with me here) consist of 3 lines of 5 syllables each.
The classic example is
Refridgerator -5
Refridgerator yo yo -7
Refridgerator -5
or
how are you doing
I'm doing great now shut up
let's go back to raids
(Just examples for the greater lulz, just to give you the idea.)
Here are mine:
Kill many a boss
Collect the maximum loot
Want more dps
When to pop CDs?
Not sure when we do bloodlust
Oops, there we had it.
"Hey, CR Panzer"
"Why do you die all the time?"
"I am tunnelling."