The dye system and Norn town clothes in Guild Wars 2.
For some reason the town clothes weren’t working for me in the previous beta, they just didn’t show up, like my character didn’t have them or something! But they worked in the Stress Test, so yay! Don’t know if I’ll really use the town clothes much in the actual game though..?
And I unlocked a silver dye, though my Gregor has no use for silly silver dyes! ;D