Watch the Intervals 4 online guitar lesson by Matthieu Brandt from Jump Blues
The first blues position is ideal to create different types of accompaniments with intervals.
These examples are in the key of A and use 4ths, major and minor 3rds and tritone intervals.
By remaining in the same position you add consistency to your accompaniment; you don't move around a lot.
With a pattern based accompaniment going you create a nice and full background for a soloist or singer. And in the meantime you're not hammering away bar chords, but actually playing some nifty changes.