My hobby to do is seeking knowledge. Without knowledge, how can one expect to engage and act in any human society or nature?! You can't. I learn to know new things everyday from the tiniest happenings to the cosmic happening. My liked thing to do in order to know more is to directly experiencing things I've never tried before, which occurs on a daily basis. People may not understand what I wrote here as a hobby, but let me give you this polar opposite example to contrast with my hobby: some people like the hobby of ignorance.