Reading (duh), writing (theoretically), pens, flags, music (alternative, electronic, and classical mostly. K- and J-pop also welcome), languages and scripts, trains, astronomy, anime, assorted fandoms.
Since my job blessedly lets me have an earbud in while I work, and since I'm caught up on all my podcasts, I've started listening to audiobooks. I just finished an Era 2 reread this way, and today I started again the Way of Kings.