Mexican hot chocolate is chocolate-y and sweet. There's a spice to it, like chai and cinnamon.
The one I have most access to is Abuelita, meaning little grandmother. :)
When I make the hot chocolate from the wedges, it leaves some granules in the bottom of the mug. I have very early memories of finishing off a mug of hot chocolate and seeing the granules there and trying them (but for some reason they're not too palatable so I always dump them down the drain).
There's also Ibarra brand. I've tried it and it's around the same as Abuelita.
One time when I worked at an ice cream place, I brought abuelita to work and blended it in a milkshake with a bit of ice and coffee. It was absolutely divine -- the most delicious iced coffee chocolate spice beverage amazingness I have ever tasted. <3
If you get a chance, try some mexican hot chocolate! It's delicioso! :9