I'll have to second that Americans with bad accents thing.
Assuming a fully-live action picture, with CGI kept for effects, and the dual-scale thing like LotR used to make the fairies look short, though preferences for actor appearance would apply to character design if animation is used.
I don't want Holly played by a white woman or very light-skinned woman of colour, though I'd prefer the latter if we're not going to get Holly's real skin colour. I don't want Holly to be loaded with the femininity signifiers she rejects in the books, such long nails, long hair and make-up (obviously there will be make-up on the actress, even guys wear make-up in movies, but I mean theatrical make-up that's supposed to look made-up on the screen), just because women are 'supposed to' (which might clash with Chitili's "not looking like a man" thing, depending on exactly what she meant by it). I personally have no problem with the actress being absolutely stunning, just as long as she is so without those extraneous femininity signifiers. I'd prefer she wasn't voluptuous, given how Holly's figure is compared to a gymnast's -- I've made this point a few times, but high-level gymnasts do look remarkably like little girls, so to my mind at least, looking like a gymnast = not very curvy, though I would like some visible muscle, to prevent her kickass becoming waif-fu.
All the elves played by dark-skinned people would be awesome and make me a lifelong fan of the person responsible -- not just African origin dark, I mean like Sendhil Ramamurthy playing Trouble, and Ernie Dingo playing Root. (I dunno if they'd be any good in those roles, but I hear straight girls think Sendhil's pretty, and Ernie Dingo's an appropriate age)
Juliet and Butler I would really prefer they not be played by white people, I'd like it if they were visibly mixed race, or even played by unmixed Asians. Black people is right out, on account of the 'scary black man' connotations Butler might end up with.
Like Tolkien's creatures.
Artemis watched Holly stride towards the main doors.
If only, he thought. If only.
Due to it not supporting png transparency properly, my avatar will appear to have a light grey background if you use IE6. That's not what it's supposed to look like.