As a bass player, you put in just as much hard work as a guitarist, and when it is your time to shine, you want to be blinding. Putting your thousands of hours of hard practice into bass solos and fills can be a bit overwhelming.
Octaves are one of the most basic principles in music. They not only have great feel, but they are huge. Octaves can add a large amount of depth to a small piece of music without much work.
