Same than Bill, also listening to completely different typesy of music (African , French , Pop, Indy, country etc.) I rarely experiment the feeling of sameness. Of course if you start listening straight away, 6 hours straight of the same guy, then maybe you'll find it repetitive. Even when i buy a box set of a specific artist or formation, between the cds of this set I will listen to something that has ittle relation to the set.
Musicologically it makes maybe no sense, but I care little about it , music is about exciting my ears and my brains.
Oh yeah, when I get back to an old classic or a favourite of mine a bit like Bill , they still sound fresh.
So I guess the trick is to bury your memory of the music and maybe only try to remember the pleasure you had listening to it, ignorance is truly bliss sometimes.