The limited Chewbacca comic book series revealed that he's claustrophobic. He was once captured and enslaved by Trandoshans, and now struggles being in tight spaces (mine shafts, tunnels, vents, etc.). I would love to see anything, even a little ficlet, with Han helping Chewie through a tough situation. I don't know how they've altered their history for the new canon, but we know Chewie sees Han as a hero.