I like Rey C.'s answer, but for me, I love the sound of a small block Chevy V8. For some people, maybe it's kind of generic, but I love the low rumble. The smell of the exhaust is beautiful to me too. A close second is a humbucker equipped guitar through a high gain all tube amplifier. It doesn't have to be a Les Paul through a Marshall, like Jobwell Dunn previously said. The best rig I ever owned was an ESP Eclipse through a Peavey 6505+. That amp made Marshalls its bitch.