CiG
The Veils of Negative Existence
Funny you ask that, because honestly I can't even take most of all metal and the scene seriously (so let's call it all "dumb" as you wish, baha), but some groovy death metal that just flows really well and brvtally, tuned with a little touch of happy (major scales/"dumb"?lol) and the right bunch of guys to do it simply makes it more fun (or for some "easy to headbang to") if that wasn't really obvious enough.
Well I'm sure they're happy to not take you seriously in return, hahaha.
My idea of something fun is shit like Lawnmower Deth, anything that's offensive and tongue-in-cheek or like what KafkaX said.