Post some links to your own favourites and I'll pick one. I can't be arsed to think of one on my own.
All the superb Loiner ones like 'Northerners of the world, unite!', 'Post a ****hole on Google Earth', 'Punchable faces' and 'Amusing words'. You know when you see the Donald F*ck trademark next to the thread that you've just been assured a quality browse.
The Hoadie_Boy one where he got the arse ripped out of him for posting pictures of scantily clad singers and actresses then denied being a virgin.
I like any that invite members to describe themselves physically. I just love the idea of other posters fantasising about me