With most art, including music, poetry and all visual art, I sometimes listen/read/watch and think, "OK, this just isn't my thing." With prose, though, I pretty always feel like I can definitively say whether it's good or not. What is that? I told John about this and he said he feels the same about both poetry and prose. I wonder if this is some kind of Expert's Fallacy, whereby when you've experienced enough of some genre, you come to believe you can act as a definitive arbiter of taste. (It's possible John has read more poetry than me; he's probably read more prose too, but it doesn't matter because we've both crossed the necessary threshold.) Come to think of it, I feel the same way about film: entirely confident in my ability to deem it good or bad. Of course almost everyone is an "expert" in film. It's practically our national pastime.
I once dated a guy for a while that I knew I would eventually stop seeing; he was very smart and very attractive but we just weren't compatible in any deep kind of way, which I think came down to his essential lack of weirdness. But almost every time we went out, we had just good enough a time that I put off ending it. (I say "almost" because there was eventually a final date when he managed to actively annoy me, pushing me over into sayonara mode.) I'm reading a book like that right now. It's not very good, but it's just entertaining enough that I haven't been moved to abandon and find a replacement read yet.