[blue]Black Sabbath wanted to play a different sorta rock, their music was dark and harder, their riffs were the metal embryo. All the band found a new sound, and specially Tony Iommi, the dad of Heavy Metal guitar riffs..he had hurted his fingers in a work accident, and he need in his right hand's fingers prosthesis, and maybe this painful accident, didn't let him have better solos technique, never mind, i like his solos, he shows that you don't need be Steve Vai for do solos with soul (ok. Steve is much more technician than Toni, but Toni playing gives me things that Steve never will give me).
Deep Purple added a new element in the metal,,they were great musicians, they had a brilliant guitar player, Ritchie Blackmore. He used bluesy way for play, using some classical elements with diatonic scales ( in these times a lot of players used pentatonic scales a lot). He was different. Faster, aggresive, with furious runs in the fingerboard..burning his Stratocaster with the fingers..try to hear Child in time solo and that explains all, in early 70's..woww. He introduced how to play a lead guitar, and his way of play solos, was the inspiration for next generation of metal players (a example, Wolf Hoffmann) I always admired him, and i get satisfaction playing his songs. With these elements, iommi riffs and Blackmore solos, you can be a great metal player. Later, bands like Judas Priest, gave a different way to the metal music, with their black leather and studs look, their way of play and their sound. They used two guitar duels, burning the stage. K.K. and Glenn are a great metal couple. they shot to your brain wih songs like Exciter, Delivering the gods, Sinner, Tyrant..their solos with 2 guitars, their actitude made the metal bigger, defined. Later bands like Accept, were more aggresive, with sharp guitar sound, with these melodic solos..who don't know Fast as a shark. The NWOBHM,,gave to the metal bands like Iron Maiden, Saxon, tygers of Pan Tang, with their different sense of the metal. Iron Maiden style is based in double guitar solos playing in 3ªs, Saxon in strong and effective riffs. there were lots of bands, but the post will be eternal, and someone can say you don't talk about..i'm sorry. i'll talk about Scorpions. They were in the beginning of the movement, and they used always great guitar players, Michael, Rudy, Uli and Matthias. All ppl knows this. Michael is one of the best hard rock players, Uli is a virtuoso, and Matthias was the Scorpions trampoline. He was modern, (was called the European Van Halen) if you are select between 170 players,,you should be good!!And he's elegant, giving to metal a new sort of image, with color and striped clothes..they were in early 80's a elegant band,,no doubt, and still they have nice look. Their sound basically is: Good and hard riffs,,precious guitar harmonies, a sweet voice, mixed all,,you know the outcome. When they plays ballads, no one can play better than them. they are the kings. A lot of bands, learnt with scorpions that a hard rocker man, needs sometimes songs like Holiday, When the smoke is going down, Send me an Angel. If lots of bands plays ballads,,is why scorpions did it before. I think that Scorpions isn't a metal band, but,,they gave to the metal other sense.