My absolute favourite one-star review was for Stormlord’s Exile (the last book in a trilogy) at the Barnes and Noble page. Here it is, in its entirety:
What a wastes
Only worth reading because you bought the first two in the trilogy.
And my absolute un-favourite review? The turkey who also gave the book a one-star review, without comment, long before it was published, or indeed before the ARCS (preview copies) were even available. In other words, they can’t possibly have read it, or even seen it. I suspect it must have been someone who was pissed off by a blog post of mine, or something similar.