Challenging music

I can never tell the sincerity of your posts.

They are all sincere, even the insincere ones.

I suppose you could say that at that point where I did turn off I didn't like it, but that does not mean that I won't enjoy if I were to listen to it at a later date.

And would you say that at this point ("where [you] did turn off") - that this is the point at which you might call the music 'challenging' ?