Slash was the lead guitarist for Guns'n'Roses, and considered by many to be among the best rock guitarists in the world. He continues to perform as a solo artist to this day, and has taken his place at the very top of the Rock God Pantheon. Definitely one of my favourite artists of all time. He's also British, which never hurts.
Also, I now have my own Slash Lego minifig... how cool is that? If you say "very", you get cool points too, cause thats how cool works (convenient eh?).