I've been wondering since i started playing about 3 years ago what the "proper" technique for the fretting hand is. I usually play rhythm and low strings with my thumb on the back of the neck and switch to thumb over the neck for leads. What confused me is seeing a video of Chris Broderick playing for megadeth and he had his thumb on the back of the neck constantly and his technique looks incredibly efficient to me. When i tried this though, my wrist would always come into an odd angle and it was uncomfortable, so i stopped for fear of injury . I eventually want to play 7 or 8 string and it seems like fretting hand technique is alot more important than on a 6. Please give your insight on what you think is right! thanks in advance, sorry if this has already been mentioned, i searched it and couldn't find anything.