I don't really have a list of my Top 10, but Metallica would be at the top followed closely by Slayer. I do like all types of music and The Stray Cats would be on my list as well, as would Michael Jackson and Elvis Presley. Music is so subjective and a favorite can be just something you grew up on that hits a chord with you. I'll try to come up with a list, but it'll probably be a bit. I know I'll change it 50 times before I post it.
It's a shame about Guns and Roses, because they were a great band. But, Axl Rose man, what a POS. And he hasn't changed. Rumor was they were reuniting for a new tour, still may be, and he agreed to do Jimmy Kimmel Live, then no showed basically leaving Kimmel with a half finished live show to work with. Love the music and the band as a whole, but Rose is a piece of crap IMO.