Well, laughing is the thing I probably do most, despite myself. I consider myself an absurdist in many ways, though I don't really believe in believing in anything. I pretty much consider humans, reality, all that stuff, to be a freak show of order and chaos just duking it out for all eternity.
I love all things scientific. I could watch TED Talks (and the like) all day (and often do) just for the awesomeness of unimpeded forward and innovative thinking.
I usually can't get through a day without quoting the Simpsons, so if you know that feel, that would be awesome. I am one of those "classic Simpsons" lovers, however, so I don't really know much beyond season 11 or so.
The watching of Simpsons can also be accompanied by the smoking of weed. I am 420 friendly fo sho. I love to just smoke, play my instruments, sing, walk around my neighbourhood.
Of course, activities are always great. Adventures, concerts, karaoke, whatever. I just want to have some fun!
That being said, I love political incorrectness, crude humour, especially taboo-breaking humour (Louis C.K. is an idol of mine). I love talking about anything and everything under the sun, especially philosophy, science, politics (I'm a socialist/communist-minded kind of gal, if that matters).