...well i am mostly metal fan... i play in a rock and a metal band... i had some problems, when we played speed metal... my right hand was not well learned for fast playing... i had to practice a lot which i hated, couse my wrist started to hurt, but i dont regret it,now i can play really fast with my right hand :)) you dont play guitar just with one hand.... the right is also important, so practice with both hands...
:)