Type-related?
Some things I find funny, that may be odd to others:
--The green light next to someone's username
--Having no profile pic
The combination of the above comes off creepy but oddly funny to me. I dunno why
Other examples:slapstick comedy (physical exaggeration), dark, witty/puns, surreal/absurd, dry/deadpan, goofy, observational, poop jokes, etc etc