I've always liked Pig Destroyer's song structure - short, brutal, and to the point. The lyrics are written right in tune with the music, so there's never a sense of witless fillers... anywhere. Everything corresponds with itself to produce an immense slaughter-prone soundtrack. Fantastic songs--short, but awesome--that appease my grindcore fantasies.
Pretty decent punk that never really heads down a steep road of mediocrity. The choruses are good enough so when attending one of their shows, one will be right there with them shouting along, never losing the spirit of punk rock. Great musicianship that sustains itself all throughout.