WordNet sense 1 (marked by uncontrolled excitement or emotion):

delirious, excited, frantic, mad

WordNet sense 2 (marked by extreme lack of restraint or control):

wild

WordNet sense 3 (not restrained or controlled):

unbridled, unchecked, uncurbed

WordNet sense 4 (unrestrained, especially with regard to feelings):

extravagant

WordNet sense 5 (richly and brilliantly colorful):

flamboyant

WordNet sense 6 (striking in variety and interest):

colorful, colourful