The Mars Volta, the first few times I heard them it sounded like chaos with every instrument competing at the same time. Then I heard their album De-Loused in the Comatorium front to back and it had this endearing symphonic composure where elements of previous tracks were called back and blended into a grand opus.

Also I never wanted to give At the Drive In a chance based on the people who recommended their music to me. Only to find out At the Drive In became the Mars Volta and they also rock.