Interested to hear other people's views on this issue. I play bass, piano, church organ, a bit of rhythm guitar... Realised recently that with all of them I much prefer taking an accompanist role. As far as that goes, I love the way the bass can set the rhythm, give a solid root to the chord changes, throw in a bit of melody. A great all-rounder. For what it's worth I can't write songs for toffee.