Well, to be honest, Im have a personality disorder, have had it the last few years. Im not the only one, of course, lots of people have this problem. Sometimes it's bad, sometimes it's better. My point being Im not sure who I am in real life, a lot of the time, so I cant really compare. But I think I usually try to be pretty cheerful and make people laugh. My humour is a lot different online, though.
But I enjoy creating characters when on the net, so to speak, as do many others. And I try to be funny. I try.