I am on team vertical stripes. When Angie posted, I knew that yes I had stripes, but not much in the way of classic horizontal stripes. I feel that the slightest midsection muffin situation gets amplified and they don't feel as dressy as I would like. I have a Uniqlo t-shirt that I have had for years and another horizontal striped sweater - but the overwhelming majority of my stripes are vertical.
I did a search through my Finds and it confirms I am on team Vertical Stripes!