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.
I like to think that Rocket and Groot visited Roshar once. After a failed attempt to scam Sebariel, they fled to the Frostlands where Groot stumbled over a cremling and shed a stick.
This stick went on to encounter Shallan Davar, and the rest is history.