Anthrax was always one of my favorite bands, and from 1993-2005 they were my very favorite band. Or at least I thought they were, truth is I love too much stuff to have a very favorite band. I loved Pantera like crazy in the 90's as well as Machinehead and Life of Agony.
As I said I can't narrow down my very favorite.
Anthrax, Down, Clutch, Corrosion of Conformity, Mastodon, Opeth, Black Sabbath, Faith No More, Guns – n- Roses (NOT Axl's current lame version), Aerosmith (1970's era only), Deep Purple, Megadeth, Metallica (up until Load)...
too much stuff to narrow it down.