I know what you mean, SoNo.
Relationships ebb and flow, and our relationships with artistic material are no different in that regard.
I was actually quite surprised when, upon re-watching "The Return of the King" with my brother, I found that I had liked it
more than I did before. When I saw the final film in the theaters, I found myself unmoved by large chunks of it and wrote it off as mostly a disappointment. The scene at the Grey Havens had particularly irritated me - I thought it could have been done a whole lot better.
I can't pinpoint what it was that made me respond to it in a very different way when I watched it later. Was it because I was in the company of a child, and was seeing at least some of it through his eyes? Was it because I was picking up on a completely different vibe from the source material itself (considering how multi-faceted it is)? Was I simply in a better mood? Who knows?
The important thing is, your thoughts and emotions have not remained static.