For completeness we should also add "I can see that this is good and, though at present I like it, I believe that with perseverance I shall come to dislike it", along with a few others. Though I think it's obvious why that one was left out.
As for your example; aside from unhealthy addictions, why would one want to discard something they currently like, even if it is trash? Some of my favorite movies are trash. I suppose one could make the argument that life is currently too short to waste on sub-par media, but that would depend on how much one's valuation of watchability depends on the artistic quality of the product. For me, at least, the entertainment value I get from a work of art is only partly related to the artistic merit.
As for your example; aside from unhealthy addictions, why would one want to discard something they currently like, even if it is trash?
For the same reason that one might want to acquire a taste for something good but presently disliked. Elevating one's taste to spend more time with the good implies spending less time with the bad.
Quotes are a unique enough medium of expression that I'm interested in viewing quotes that people have found collectable, emotionally impactful, useful, memorable, or otherwise noteworthy - perhaps others are similarly interested. To clarify, these need not be even remotely related to rationality. I'm hijacking the mandates traditionally used for the Rationality Quotes thread, with a few modifications:
Please post any meta discussion in the top-level comment named "Meta".