I... actually don't care for her October Daye series. Too noir for my tastes. I read Rosemary and Rue and no further. (Though I did like Spike the rosebush/cat.) And I didn't even try the zombie series Seanan wrote under the pseudonym Mira Grant. The Incryptid books, however, are lighter and have a bit more humor to them (particularly in the persons of the aforementioned Aeslin mice), so they're the books I buy and read. Also her Velveteen series, but that's getting a very limited-edition run; the stories are all available on her lj for free, however. So you might want to give either of those a try.