The main features of DRAGON WORLD primarily revolve around the 'Transformation Guides' and the 'Dragon World Tiers.' 

Everything else is OPTIONAL and is mainly here to give writers inspiration and toys to play with. Do not feel pressured to apply everything to your character! This is again, mostly for fun and flavor.

Much of this information is taken from the extended universe as created by Dragonball Online, Xenoverse, and Heroes.