PNB's Director's Choice opened last night (through March 22 at McCaw Hall, 321 Mercer St; tickets: $20-$150) with a mixed program that seemed designed to rouse sleepers and ruffle feathers. Seattle is not really a walk-out-in-a-huff town--it's more likely to seethe-silently-and-save-up-catty-comments. But still, we did see two separate people march out of William Forsythe's One Flat Thing, reproduced, secure in the knowledge that it was the last piece on the bill. Paul Gibson's Sense of......