Why the love for Piers Anthony?
For a short answer, I’d say:
(1) teen appeal
(2) good trash
(3) Harry Potter
Why the hate? Same answers.
To, expand a bit …
Teen appeal – an early exposure to SF/F. The writing is accessible to an early teen. Perfectly clear and easy to follow. The stories unfold well. Things keep happening, the plot keeps moving. The characters are sympathetic, and have plenty of obstacles to overcome. The teen reader can follow the stream of consciousness, rooting for the hero. For further teen appeal, the obstacles are not only physical, but moral, ethical, even spiritual, and the hero tries to do the right thing. There’s love and sex, but not enough to get the books banned from junior high school libraries. And Anthony can be pretty imaginative, and humorous, too. Those Xanth stories, I think, had lots of clever cutesy magical stuff, just like Harry Potter, except probably better.
(And I’m sure there are, similarly, Harry Potter haters out there, but they keep quiet, because they don’t want to get clubbed in the head by Potter fans wielding HP #5? 6? 7?, which, at 9 zillion pages, is lethal.)
People read some Piers Anthony as teens, enjoy it immensely; and there some stay, while the more literary ones move on, and never go back. But who knows, maybe future generations will consider Shakespeare second only to Piers Anthony.
My two-word summary of his body of work, as I know it, would be good trash, and I’d mean that as a compliment. Note: I read only a small fraction of his output, and I think I missed his “bloat” years. That might be bad trash. But I bet some of those stories could be turned into good movies.
There is one essay where LeGuin approves of trash, of garbage, saying that sh-- is good fertilizer. And then, in contrast, heartily condemns faked-up artificial “plastic” stories, targeting Jonathan Livingston Seagull. (I’m not sure how’d she categorize Piers Anthony.) She also lavishes much love on Tolkien, Vance, and Dunsany for their language, and the speech of their characters. Like in Tolkien, not only is so-and-so the noble high king of wherever, a figure out of legend, in a mythic world, in an epic story, but he talks like it, too. And then she sort of disses Katherine Kurtz as an opposite example.
LeGuin – seldom a dull moment, intellectually.