Anthrax has always been the bespoke kings of fun metal to me, but I feel they get the least respect and recognition of the big four of thrash. They're just fun loving and smile inducing man, and there aren't enough metal bands out there having fun with the genre; it doesn't have to be all serious and brutal folks, there's nothing more metal than just having a kick ass time. Such is why I also love Gwar so much.