I didn't really smile or laugh for months - though I was known for my smile before. I'm just starting to again, and yes, I often laugh like that. My family is like - ok, it's time to stop laughing now! I rarely laugh in public; thankfully(?), I'm not relaxed enough to laugh about anything when I'm around non-comfort-zone people.
I am to the point where I can get amused at how long it takes me to get a joke nowadays. And once I do get it, I've thought so hard about it, that it simply isn't amusing. It feels more like working hard and scoring an A on a test!