Chocolate is one of those ones that are hard to get right. I can't stand mint for the most part, so I stay away from them.
In the past, I only found one Chocolate
eliquid I liked, and I can't remember where I got it from (is was 100% VG though.
Now, since I DIY, I use FA's Double Chocolate. Right now, I'm using the clear version, Not as good as the dark version. I use them straight, no other flavors added, just a touch of sweetener.
Now and then, I will add a touch of NY Cheese Cake to a tank. Yum!!