Re: Mya Diva?
I've only used two types of coals, Ahkla QLs and exotica fingers. If I feel like dealing with cutting the exoticas and putting them on the stove, I'll use them, they have no taste, no smoke, holds together well. Good price as well. The Ahklas are my "too lazy to care" coals, I light them by an open window, as the smoke/fumes/sparks at the start are a bit much, and they also work well. If you don't mind spending an extra 5 minutes, get the exoticas.
As for shisha, I started off with Al-Waha after nine and bounty, and they're a great smoke. Layalina blueberry is also quite good. Right now my favorites are Fusion Orange (turning into my daily smoke) and Al Fakher grape.