Your Defense Mechanism is Humor
When life gets you down, you just have to laugh. And that's a very healthy reaction.
It's not that you don't take your problems seriously. You do. You just don't let them control you.
You are able to make the best of things, even when things look very, very bleak.
Some people may consider your sense of humor to be dark, but it has served you well!
I would say that's fairly accurate.