Yarrow was the very first of his books I've read; story about a woman who is also a writer, and has an entire world of myth inside her head. She has a guilt complex, since all she does is transcribe the stories they tell her and so she doesn't feel like a real writer. And, as (un)luck would have it, a dude shows up who likes to feed on dreams.
I liked it, but I like a lot of what De Lint does, just wish it was easier to find him locally.
Mulengro is my favorite story of his; fascinating tale featuring the gypsies in Canada. Gets quite a bit darkish, though, but nothing over the top or graphic.
I'll have to go check, but I think Subterranean Press had a short story of his online a few months ago.
http://www.subterraneanpress.comit was either the full story or a teaser, but I'm pretty sure I saw his name there.