Well....We all know that the BIG purpose of Gas Giants is to make Stars in the future, also to be like a massive Cosmic 'Vacuum cleaner' for the solar system.
One of my favourites is Saturn (Our Next sun), it has the same composite as a Sun except for the fact that it is not burning. However it is 'unstable' (in the billions of years yet way) and is certainly the next to go up like a roman candle!
Above is the mysterious gaseous 'eye' of the planet.