Watch the Out the Dorian online guitar lesson by Freekbass from 50 Freekbass Licks You MUST Know
In a lot of funk and soul lines you will hear the dorian scale used a lot. The big reason for this is because of the raised or major 6th note of the scale. When you move around from the octave, to the minor 7th, to the major 6th, it creates a kind of cool tension or sound you would not have in a normal minor scale with a flat 6.
I start this line by going straight from root, 5th octave, and then moving to the minor 7th to the major 6th (D to C to B on the G string). The first ending with an 8th note feel, the 2nd ending with a 16th note feel.