Reading, especially history. Currently reading "Romance of the Three Kingdoms" 三国演义 in the original Chinese, though I'm only 7 chapters into it
(too much time spent here).
Music, from opera (esp. Wagner) to hardcore punk (Black Flag, the Minutemen, Discharge, Ripcord, Heresy, etc.). I'm currently slowly studying "Der
Ring Des Nibelungen" on my own.
Baseball research. No, I'm not in SABR: I'm too poor.
Collecting broadcasts of old sporting events on DVD and, where possible, as MP3s.