The size of the guitar certainly affects how its held. My acoustic is a dreadnaught and I have/had the same problem described above. I solved that by moving away from the commonly suggested way to hold a guitar and now hold it very similar to the way classical guitarists play.[br] [br]As touched on above, the way a guitar is held changes throughout the years and i've often thought the recommendations were guided by fashion as much as 'proper' position. As late as the Beatles Invasion many guitarists positioned the instruments high up on their chests, e.g., Beatles, Orbison, B.B..
-- Chet Atkins