one of my favorites ever was from my lurking days on the old ISH...but the one where Shogon scanned some old thread and saved it then brought it up to embarass another poster, and everyone ended up making fun of him for saving the thread instead. I think that might've been when his pic first surfaced too
One of my favourite quotes is when Lebron23 said something along the lines of; "I hope your parachute works, because you'll be sky diving right into my ignore list.", or something similar to that and what made it funnier was that Lebron23 couldn't spell half of those words.
The vacuum cleaner thread was absolutly hilarious, I also find threads where kwajo, sakf and hippos are involved turn out to be hilarious.
Reppy is also a pretty amsuing character, I like the cut of his jib.