Zest could be used to describe a quality person who is filled with enthusiasm and energy.
I envied their zest for life
There was a pest in the zest! -poop
These word can be such as zeal, zest, zatch, zany, and zealous. "Zatch" is a term for a female genitalia, so you probably do not want to use that when explaining your irrevocable zest for said person.
The chef added some zest to the food with the spices.
H
The word is gusto!
Chi?
Zeal.
If one applies the definition of zest to the discipline of technical writing, one could take this meaning to describe writing that is enjoyable and exciting.
zany, zest
brio, zeal, zest
Xois Yuia Zest