Reason you should like Blues is because pentatomic scales are only different by blue scales by a note or two.


----------------------5-8-
-------------------5-8----
---------------5-7--------
-----------5-7------------
-----5-6-7----------------
-5-8----------------------

Compare that to the pentatonic in A minor and you'll see why it sound like blue. My advice to making it squal is break away from pentatonic or pay close attention to Zakk wylde.


Try a Harmonic minor scale or a major scale! Or a medolic minor scale. Study why those solo sound badass, and look at the way the fingers move.