The Minor Harmonic is my personal favourite scale. It sounds very mid-eastern. A guy named Yngwie Malmsteen used this scale a lot in his music and brought it into the mainstream guitar world (thanks Yngwie!) This is a very cool, useful, and ethnic sounding scale. Remember the picking method you use for this scale - economy picking! Downstroke, upstroke, downstroke (sweep to next string) and repeat...
Harmonic Minor
First Mode
Minor
1st 2nd b3rd 4th 5th b6th 7th
Locrian #6
Second Mode
Half-Diminished
1st b2nd b3rd 4th b5th 6th b7th
Ionian Agumented
Third Mode
Major
1st 2nd 3nd 4th #5th 6th 7th
Dorian #4
Fourth Mode
Minor
1st 2nd b3rd #4th 5th 6th b7th
Phriggian Dominant
Fifth Mode
Dominant
1st b2nd 3rd 4th 5th b6th b7th 
Lydian #2
Sixth Mode
Major
1st #2nd 3rd #4th 5th 6th 7th 
Altered Dominant bb7
Seventh Mode
Minor
1st b2nd b3rd b4th b5th b6th bb7th 
