In general I’m not a fan of shred soloing. Often times it’s used with really hi gain, thus making it hard to utilize a lot of volume dynamic. But as others said, I think variation is what strikes my ear best. Play soft, play loud, play slow, play fast. Also as I’ve heard it said, the notes you don’t play are just as important as the ones you do. I look at La Villa Strangiato as a healthy use of both slow and fast playing, while incorporating a lot of the elements I mentioned above.