I'll add my 2 cents as I am European....
I don't enjoy the chocolate as much here in Canada, we thought it was great when we came here and discovered you could get Cadbury's, got even more excited come Easter when we saw you could get Cadbury's Creme Eggs and Mini Eggs....they just weren't the same though, more of a sugary, cheap taste than the stuff we were used to back home...not that Cadbury's is a high quality chocolate anyway, it's not.
I don't really like Hershey's either, the only product I tend to buy is the Cookies & Cream bars, they are a little on the sweet side again though.
Something else though I found out although this isn't to do with North American candy but the Cadbury's chocolate tastes better in the Republic of Ireland again than where I am from in the North (UK part), apparently it's because they use more cocoa butter or something in their chocolate which is made in Dublin than the stuff that is produced in the UK mainland.
There is good and bad candy everywhere though and different countries have different tastes.
...my actual favourite chocolate bar at the minute is Swedish...Marabou, available at most Ikeas! lol