You used to love it but now.......................

Here's a fun question or maybe even a thought provoking one.

I guess we've all been listening to music for a very long time,what music/artists did you used to love or listen to a lot but now you struggle to sit through?
Not stuff you always hated.
Nor stuff that's been over-exposed,there's a whole list of great music that loses it value due to just being played far too much either by yourself or via the radio.
I'm not even talking about stuff that in hindsight you realise you probably overrated although that may play a part.

I listen still to a lot of stuff I liked 25 years ago and still get a kick out of it,some of it makes me misty eyed and nostalgic,some of I still enjoy the energy,an awful lot I've replaced on CD in recent years,hundreds of records actually.
Despite the fact that I can now hear influences, flaws,imperfections,naivety, even some crassness in the music that I didn't at the time,there is still a powerful effect from an awful lot of it.

However I seem to work on some kind of internal sub-conscious clock because some stuff I absolutely adored just leaves me cold now but I have the feeling at some other time in the future I may latch back onto it but not now.
Anybody guess why that is?

The bands/albums at this moment I'm struggling with are Sychronicity by the Police,Ocean Rain by Echo and The Bunnymen both records I liked a lot at the time but are a drag for me at this present time.The main band to show this effect are U2 who I loved at one time but I can barely stand to listen to them now,15 years ago or so I must have played The Joshua Tree to death and yet now I get nothing out of it,it just falls flat.

Who does this to you and anybody work out why this happens to you?
Or am I a bit nuts?