On the one hand, I once listened to "Why Don't We Do It in the Road?" for three days straight. I had not stopped enjoying it when I stopped listening to it. (My roommates and guests did not share my enthusiasm, but I don't think they ever liked the song.)

On the other hand, while attempting to transfer a customer to the appropriate party I once listened to "Unchained Melody" for almost an hour. I didn't snap (it was a mill of a call center, so public nervous breakdowns were not unheard of), but the piece gained the ability to infuriate me even without the extra hours and fuck-with-your-brain inconsistency.