As wld says, Bream was a relentless champion of contemporary works, though even he had his limit. In A Life On The Road he describes how he went on holiday with the score for a new guitar concerto, but after two weeks of looking at it decided he couldn't make head nor tail of what the composer was up to and that life was too short to continue looking!

I might also mention that by comparison with some later works for the guitar, the Nocturnal is quite tame. (I remember reading a review of a concert of modern guitar music that started with something like when the concert opening warm up piece was Ginastera's Op.47 Sonata (another notorious piece from the late 20th C repertoire - MCP) I could tell we were in for a hard evening!)

Mick