He's a big-time sucker for anything that's colourful, floral or strange looking e.g. psychedelic-looking things, distorted images and disproportionate patterns/designs).
In his own words, he's "pretty amateur, if not plain bad", at certain sports like swimming, badminton and ice skating. A true Jack of all traits, but he's the best one out there. Oh, and he also makes teeny tiny itty bitty clay sculptures too occasionally. If he just knew how to turn those sculptures into action figures, he'd be an amazing toy-maker because Yuan here is the biggest fan of making toys.