well,i have to SLIGHTLY disagree with you just a tiny bit.
i feel as if blues is more about a feeling than it is about perfect tecqnique,although stevie ray was great at both.
but since you phrased it like you did,i can only assume you have not heard a very wide range of metal.this is not meant as a slam,but just recently i have been introduced to the NEW metal scene(as opposed to the 80s thrash i was used to,such as exodus,slayer,etc.)
what i am getting at is that i find metal to be one of the genres most **** about getting the guitar playing perfect...i don't mean Korn either(obviously),or napalm death or any of that ilk.i mean like "at the gates","lamb of god",and a whole slew of others who REALLY impressed me today with the way they have moved metal forward.
i went for years thinking that metal was dying out,because i could never find any good new metal bands to listen to.
but now i have that sattellite radio thing(sirius)
and i tell you one thing...those bands that i heard today are VERY serious about perfect tecnique.
and i will tell you another thing....those bands i heard today are also much better than what was the best in my day.
especially "lamb of god"
that music is the advanced form of what i thought was advanced music when i was in the eightees