I can be all of these. I can be silly or sardonic. I enjoy absurdities a lot, especially subtle ones, and I will say something ridiculous or ironic and usually use a tone to make it clear I'm joking, but sometimes people don't get it . I probably laugh at a lot of things people don't see humor in for the same reason.
And it's their problem. They just don't have a sense of humor.
Self-deprecation is probably my main one. I also stick to sarcasm/dry/slightly morbid/observational humor. Sometimes I move into complete silliness.
Many people think I'm serious when I'm joking, and joking when I'm serious. That can be unfortunate.
Really though, I don't think I'm that funny myself. I'm a humor leech: like I said, the observational humor, plus bouncing things off other people. Actually, most of the time when I make people laugh, it's unintentional.
I don't know if it's an INFP thing, an introverted thing, or a crappy sense of humor thing. My sense of humor usually involves wordplay, irony or self-deprecation, usually playfully sarcastic, at times morbid. But this often happens: When someone jokes with me (not a "priest walks into a bar" joke, but mild teasing) they usually end up hugging me, saying, "I'm kidding, I'm kidding! " It's not like I don't get the joke or think it's funny, I just don't always or What am I, retarded, people?
That's basically mine, too. Some people don't understand it when I seem to pull it out of nowhere XD;
The best way to describe my sense of humor is to compare it to how JD's (from Scrubs) mind works when he thinks of obscure things. It's almost exactly like that
Occasionally, I have a "I am not amused" reaction & ignore a joke, but that doesn't mean I am offended either. That just means I think it's not very clever or funny, or it's passed the teasing line & is just outright rude/stupid.