There are lots of good instructors on Ambergris and the best way to determine who would fit the bill best is to take a few minutes to check into each diveshop and actually meet the instructor and see who you gel best with.
While each Instructor is trained along the same guidelines the best choice will be who you feel most comfortable with and who instills the most confidence when you talk with them.
Whoever you choose they are in for a treat
Gaz Instructor Padi #48642
Playa Blanca Beach Resort www.divebelize.com