Descriptive:
* as fresh as a daisy: meaning full of energy and vitality.
* as fresh as paint: meaning new, clean, and unblemished.
* as fresh as a spring breeze: meaning invigorating and refreshing.
* as fresh as a morning dew: meaning clean, pure, and sparkling.
Comparative:
* as fresh as yesterday's bread: meaning slightly stale or not as new.
* as fresh as the ocean air: meaning clean, invigorating, and expansive.
* as fresh as the snow: meaning pristine, pure, and untouched.
* as fresh as a new start: meaning full of hope and possibility.
Figurative:
* as fresh as an idea: meaning novel, original, and exciting.
* as fresh as a new perspective: meaning different, insightful, and enlightening.
* as fresh as a new beginning: meaning a chance to start over.
* as fresh as a challenge: meaning stimulating, invigorating, and motivating.
The best completion will depend on what you want to convey.