Actually, I like the Harry Potter takedowns he does, but I find the zomgrationality bits boring and just skip the preaching.
As fanfiction, it is surprisingly good prose. But you know, it's still fanfiction, namely Harry Potter fanfiction, and thus has trouble actually rising above that. I like Darths and Droids for the same reason.
I think that the divide might stem from the fact that initially, HPMOR was mostly "zomgrationality preaching" in the form of fan-fic, not the other way around. Maybe this changed recently; I haven't read the last 20 or so chapters.
As fanfiction, it is surprisingly good prose. But you know, it's still fanfiction, namely Harry Potter fanfiction, and thus has trouble actually rising above that. I like Darths and Droids for the same reason.