General Nice Words:
* Amazing
* Adorable
* Adept
* Affectionate
* Agreeable
* Amicable
* Amusing
* Angelic
* Appreciative
* Artistic
* Attentive
Words Related to Feelings:
* Affection
* Amused
* Appreciation
* Adoration
Words Related to Personality:
* Adaptable
* Ambitious
* Articulate
* Astute
* Adventurous
Words Related to Appearance:
* Alluring
* Attractive
* Angelic
Other Nice Words:
* Accommodating
* Astounding
* Audacious
* Avid
This is just a starting point, and there are many other nice words that start with "A." You can use these words to describe people, places, things, or situations.