I'm a sucker for a bay with some white on him. All bay -- blood, seal, bright, dark...it's all pretty! Love bays. I love all of 'em, but I do like white markings...the contrast between the colors is beautiful.
However, I'm also a sucker for the odd. Specifically, I love the creamy color of a nice Cremello. I like it when they're almost white, but the almost...buttercream?...ones are really very pretty. I'm also a sucker for the blue eyes; the shading in them is just so amazing! Of course, paints with blue eyes are also gorgeous! But I'm biased towards paints for the Gypsy Vanners. ;)