Taste
The most important and obvious factor to rating choccy is the taste. I enjoy a smooth yet subtle flavor. Not too overwhelming but pleasant to eat plenty of.
Texture
For me, the texture cannot be bland but rather an exciting adventure to partake in. The blocks of chocolate should not be too thick as to be a chore to eat, rather a more managable and crunchable size.
Price
I ain't made of money, but I am willing to splash for good quality.
Mouth feel
The mouth feel is a very underrated rating category. Chocolate these days have a variety of fillings inside the chocolate, some have popping candy and others have milk bottles. These can be both positive and detrimental towards the overall rating. I also hate it when you eat too much of a chocolate and you get a weird ass feeling in the back of your throat.
X Factor
Nice packaging? Vegan? Funny shapes? All bonuses for me.