Hershey's definitely tastes like sick!! Mind you, give me a Reeces Peanut Butter Cup and I'm in heaven :-* Some of the stuff they have out there is proper mental! I like to get some bits from this site every now and then and they have loads more choice when it comes to Mars products. Like tuesday_wildchild said, the Peanut Butter m&m's are good but you can't get them over here, I even went to m&m world in Leicester Square to check :-[ http://www.americansweets.co.uk/ (Based in Aldershot!)
There are two new sweetie shops in Liverpool town centre that sell the full American M&M range I've teased the Dubweisers with the pictures (they love them).