What works better for you? The entire band you're in writing in they own parts and seeing what fits, or, having 1 guy (most likely the guitarist/singer) write a complete song. Personally I enjoy taking the time to work on an individual part. But whenever me and my guitarist friend write a song together it doesn't compare to our other guitarist's one-man written songs. I don't understand, how does 1 person beat 2 people working together?