Sorry I got on this topic a little late but I totally agree with the idea of "personalizing" your wyvrn. I would, however, like to take it a step further than just color. If it was up to me I would ask SE to give us drgs the option to "raise" our own Wyvrns much like you can with Chocobos. This would not only make the look of the wyvrn different but it would customize its self to your play style. If you are a drg that solo's a lot and uses a lot of healing breath maybe you raise it to have maximum amount of HP and it gets a little bigger. Then again, if you are a drg that is always in alliances and you only care about dmg maybe you raise it to have a stronger elemental breath and this could change the drg to randomly change color based on what day it was. Idk, these are just thoughts but it's something I've always wanted for my drg personally. ^^/