[Quiet Man Cometh]

Gloryhammer and Alestorm are the same people, or partly the same. I think the singer is different. I'm not sure pirate metal is actually a category but I wouldn't lump it with power metal, especially since both are parody bands. I like "Rise of the Chaos Wizards" from Gloryhammer and Apocalypse 1992 is just so epically ridiculous when you start listening to the actual lyrics that it's all just too fun. I haven't listened to all their stuff but apparently there are stories behind all the various characters. Even the line in Alestorm's "Death Throes of the Terror Squid" about fighting ninjas and vikings is explained.

Other people know better than me, but apparently Gloryhammer started as a parody of Bal-Sagoth. I actually don't know all that much about power metal, except that I've liked what I've listened to, so far. It's fun. :). Best anti-depressant ever.