You say 'less obtrusive', so can I offer a suggestion? I recently discovered Taize, the music of French monks, which is incredibly simple in construction, and forces you into a less complex, less obtrusive style of guitar accompaniment. If you can't find any of their music, a good similar example is to try Greensleeves as a call-and-response vocal and guitar, or play the Stones' 'Lady Jane' as if you were Bach, and you had accidentally been born as a blues guitarist. It sounds bizarre, but I promise you it will lead you down routes to unobtrusive yet tasteful picking that you never thought existed! Good luck - Ian B