Linda, as I say, I really don't think it matters that much, but if you're in a dilemma, you might want to think about what kind of author you want to look like; business-like craftswoman who writes a mean chick-lit thriller while meeting all deadlines with time to spare and a perfectly clean manuscript, or slightly mad, poetic artist who follows their own road and will inspire a cult following... and meets all deadlines with time to spare and a clean manuscript?
If in doubt, wear the clothes that make friends say not, 'that's a great jacket' but 'you're looking great today - and is that a new jacket?' (And nothing that you tend to fidget with, whether it's a skirt that rides up or too-long cuffs you keep pushing out of the way.)
VGL again
Emma