Maybe sloppy isn't the right word, sorry to offend. I'm thinking mainly of the beginning of Mr. Scary. When I really listened to it, it didn't sound as "tight" as I recalled by memory. It's not so much sloppy as a particular style of playing and the guitar sound as well. When you listen to say, the intro of Master of Puppets, which is another riff using open and palm muted single notes on E and A, it's totally different. The Metallica style playing is tight as a drum, no extra sounds, overtones, notes, etc. It's precise like a solo. The Dokken rhythm style is a little more "swishy" with less palm muting and more passing notes allowed to come through. It's very Eddie Van Halen, with more raking than palm muting. It always seemed that when it came solo time, that's when George really dropped the swishy thing, and made every note ring true. Think the beginning of In My Dreams as well. He's sliding and raking, not really chunking. It's effective, but to me, always sounds a little too loose or wild for my tastes. I believe it's what separates the death metallers from the traditional hard rockers. When I've shown traditional rockers some thrash or death metal riffs they just can't get the tightness down. Similarly, they'll show me a jammin' swishy rock and roll riff, and I'll make it sound so sterile. Some can cross the line back and forth, but I haven't jammed with many of those types.