Lindt, milk chocolate.
As for Hersheys, we don't have it in the U.K, but I tried some from the states and it was pretty bad, to me, it has a horrible after-taste.
I like dark chocolate the best. In my school we did a chocolate lab where we tasted like 100 different types of dark chocolate, and rated them. Hershey's and one other one that I dont remember won the contest.
I like 'dat dark, bitter chocolate - y'know, the ones from Belgium. It doesn't melt too fast in yo' mouth, an' it doesn't trigger painful sensations in the nerves between my teeth.