On the internet, I am quite serious. I find there's too much humor here, most of it the kind I don't find funny. Humor via text and images just does not work well with me at all. Whether I'm the one doing it or I'm seeing it. I'm not witty and I'm not really funny because I don't know how to be in this setting. And that's okay. Because I think the internet could use a few more serious people in it anyway what with the amount of people who go gallivanting around with their odd fun and games. I find people have far too much of an aversion to being serious anyway. A lot of the times, saying things in an honest way without any frills can make me feel loads better. So can talking things out candidly. Serious has its place and it doesn't just mean depressing or negativity.
In real life, I'm mostly the same as well. But only if I'm in a public setting. In my own home (which is where 99% of my time is spent anyway), with the person I love most... I'm constantly laughing, mocking things, and making jokes. I make up a lot of weird and stupid words and constantly give nicknames to everything. Although mostly I just giggle because he's better at it than I am. Most of my time is spent proclaiming, in a stupid voice, "YOU'RE SO FUNNY!" whilst laughing hysterically. It's more effective in real life to make me laugh because it involves more sound-based humor and I react well to funny voices and the way people say things. And I like to do stupid voices myself too and say things in stupid ways. Movement-based humor is also similarly effective. I like to do weird movements and dances and just laugh at how stupid it is. And then make him do weird movements and laugh even harder. Yeah, I am a completely different person when I'm around that guy. I just prefer "goofy" to "witty," I guess.