MINOR PENTATONIC ADD 3 is a great bluesy sounding pentatonic scale variation. (1,b3,3,4,5,b7)
Just like the standard blues scale, since it has 6 notes, you can play an octave of it on two strings then move that simple shape up the neck at octaves giving you access to 3 octave scales while only having to really learn a single small pattern.
If that doesn't make sense, the diagrams below should make it clear.
If extended three note per string picking lick compatible version aren't your bag, you can find the more familiar version based on the pentatonic scale boxes HERE