I seem to go through phases of extroversion and introversion. In the extroversion phases I feel super sociable. I blog my butt off, I'm all over the web commenting, I call friends and have a burning desire to express myself, to write, to communicate. I crave visual stimulation and conversations. When I am in an extroverted phase i am funny, or at least think i am which amounts to pretty much the same as far as i'm concerned.
During the introversion phases I want to stay home and be quiet. I go cocooning. I resent phone calls and changes to my routine. Images leave me cold, (see, no images here) music and noise irritate me. My own family irritates me (okay, that happens during my extroverted phase too.) It's just that things feel louder, more rushed, more aggressive. So i disappear a little. I go into reading frenzies, one, two three books, often at once. I cook. I eat. When I'm in an introverted phase, the best way to communicate with me is through Goodreads.
During my introversion phases my sense of humor is nonexistent, as you may have noticed.
...which is not to mean that i feel depressed, (though the concept of manic-depressive comes to mind-- but I'm getting older and maybe wiser thus less eager to scrutinize my behavior and try to define it in pathological terms.) I use to feel an introverted phase come and panic. Now I welcome it as a reflective time, and trust the process.
I'm in an introverted phase this week, did you guess? (though writing here today could mean you are witnessing the trail end of it.) I'm at my desk wearing faux uggs and baggy clothes, there is a pocket radiator blasting heat near my desk. The dog and the cat are hard at work napping at my feet. Cozy and solitary. I like it. For now.