Chocolate is terribly hard to master. I personally don't care too much for the LorAnn Chocolate, nor the TFA Milk Chocolate. As far as a straight chocolate goes, double dutch seems to be decent, but I have difficulty increasing the flavor without it tasting burnt.
Capella makes some great chocolate-esque type flavors, like Chocolate glazed doughnut (delicious), and Chocolate fudge brownie (also great), but they're not what I too am looking for, a good, solid, plain milk chocolate (Hershey's).
If anyone has the chocolate answer, I too am listening.