I like music that just oozes rage, sure. I'm not really an angry person but I just love music that's practically leaking with the singer or the writer's sheer fury at whatever the subject of the song is. You can have lyrics that criticize something, or insult someone, but unless the music and the singing actually backs those views up, they're just empty.
Like Bulls On Parade by Rage Against The Machine, to name but one good example. Zack de
la Rocha's pissed off that all these weapons manufacturers are exploiting any war to make a profit, and it really comes off in the song.
Tom Araya from Slayer's voice also sounds like he's pouring all his anger into the mic, even though Slayer aren't always that good.
And, well, Ministry's last three studio albums were all criticisms of the Bush administration, and Al Jourgensen's outrage really came off well, both the satirical style of some songs, and the direct accusations contained in others.
I also tend to like music that evokes imagery, or can evoke imagery, of a kind of last stand or final battle, even if it's not necessarily Power Metal. Like the song Battle Hymn by Manowar, or For Those About To Rock by AC/DC. They're often full of emotions as well.