I enjoy discussions about a wide variety of topics, and will usually be willing to argue either side if I know about it. I like to observe things that are going on around me, and I enjoy noticing minor things that would normally be overlooked like a small flower on the edge of a hiking trail, or a random discarded item on the sidewalk. Or a small dragonfly buzzing around the yard, when nobody else seems to notice it.
I tend to retain useless information that has no value, but for some reason it lodges in my mind. Like dragonflies can fly as fast backward as they can forward. Or that there are only a few vegetables that are perrenials. Generally not useful, but interesting to think about sometimes.