I think posting on a discussion board can tend to come across in a certain way, personality wise.
I'm the type of person "in real life" that is usually considered quite funny. I have a very quick wit and I can usually disable someone rather quickly with a facial expression, smile or definitive body language. Of course, you can't see those things here but you might notice a person's humor (or lack of it) by how they post.
So what tickles your funny bone? Do people consider you "the life of the party"? Are you able to grasp when someone is actually joking or do you find yourself typically misunderstanding how something is translated?