Hey Veganbikechick, not sure if you are originally from Seattle, but I live in the Portland Metro area and I can say for certain that a road bike decked out for commuting would seem perfectly "normal" here. I don't imagine that Seattle is too different. I can say this with certainty because we've got some weird/unusual bikes around here. So go for it. Knock yourself out with accessories. Soma makes some nice road bike sized fenders of different colors even. Civia has Market 48 fenders of anodized metal in a lovely red that I may end up getting if/when I get my road bike! Have a great time too.
Cheers from down the way.
"Opportunity is missed by most people because it is dressed in overalls & looks like work" - Thomas Edison