I really don't think Meyer's writing is shallow at all. I would instead call it exceptionally "porous"; it is, as many people have pointed out, so lightly sketched that it is very easy for the reader to project their own fantasies, desires, and concerns (or, with some of her critics, their own anxieties and wounds).(Unfortunately I can't link directly to the comment - the date/time looks like it ought to, but doesn't. :/ It's Mar 26, 2011 at 09:11 PM.)
Which is why I also can enjoy the TWILIGHT books, even re-reading them with a critical eye, much more than the HUNGER GAMES books. Whatever else Collins' writing may be, it is concrete -- detailed, grounded, comprehensive, in a way that makes it look like solid granite compared to the wispy latticework that is Meyer's style.
Unfortunately, that means when a crack appears -- illogical worldbuilding, an unappealing character, even a niggling inconsistency -- it is much more difficult to ignore or handwave away. It grates on me constantly, to the point that I couldn't even finish the trilogy.
That may be part of the Lackey appeal, at least to me. I whine and rail abut the flaws I see, but they don't stop me reading.
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