The single scale that most opened up my playing (aside from Major) was the Harmonic Minor scale. IF you like angry heavy music (suitable for flamenco, metal, classical or jazz) give it a try it's great scale for purging yourself of angst.

Here's A Harmonic Minor: ABCDEFG#A

Here are the intervals:
WHWWHTH,

the triads (starting on the root):
Minor,Diminished,Augmented,Min/Dim,Maj/Aug,Maj/min,Dim/Aug

Have fun!