General:
* Whimsical
* Ethereal
* Airborne
* Fluffly
* Spongy
* Delicate
* Feathery
* Bubbly
* Effervescent
Specific to food and drink:
* Foamy
* Creamy
* Whipped
* Aerated
Specific to writing or entertainment:
* Superficial
* Frivolous
* Lighthearted
* Unpretentious
* Escapist
It's important to choose a word that fits the specific context and tone you're trying to convey.